Werkstatthandbuch Book 1 · Seiten 1001–1100

24-01-2 General Fuel System Service 24-01-2 TESTING AND ADJUSTMENT All adjustments affect engine emissions and should Groups 29 and 50 for test and adjustment procedures be performed by competent personnel using specified for decel valves, EGR valves, PVS switches and all other equipment. Refer to Port 50-29 of Volume 5 before emission control systems equipment. performing critical fuel system adjustments. Refer to each carburetor section for specific adjustment points for individual carburetors. Refer to CLEANING AND INSPECTION AIR CLEANER Refer to Volume 5 for the recommended air cleaner parts, or a drill or wire to clean out any openings assembly maintenance mileage interval. Cleaning the or passages in the carb

24-06-1 Model YFA 1-V Carburetor 24-06-1 PART Model YFA 1-V Carburetor 24-06 1-6 Engines Except Fairmont/Zephyr w/Automatic Transmission SUBJECT PAGE SUBJECT PAGE DESCRIPTION ADJUSTMENTS Cont’d. Carburetor Assembly 06-1 Metering Rod Adjustment 06-5 ADJUSTMENTS REMOVAL AND INSTALLATION Automatic Thermostatic Spring Air Horn to Main Body Gasket 06-6 Housing 06-4 Carburetor A

24-06-2 Model YFA 1-V Carburetor 24-06-2 CHOKE PLATE FIG. 3 YFA 1-V Carburetor Equipped with Solenoid-Rear View of engine temperature conditions, a temperature controlled pump bleed is incorporated Fig. 4. I-STALL A thermostatic disc is designed to open and close DASHPOT SOME MODELS within a specified temperature range. As the disc worms to a temperatur

24-06-3 Model YFA 1-V Carburetor 24-06-3 PUMP LIFTER LINK PUMP BLEED HOLE V2320-2A FIG. 4 Temperature Compensated Accelerator Pump System CHOKE CHOKE PLATE

24-06-4 Model YFA 1-V Carburetor 24-06-4 ADJUSTMENTS AUTOMATIC CHOKE Most carburetor adjustments are factory set, and based on guidelines determined for reduced engine emission. In orde to adjust: Automatic Choke THROTTLEPOSITIONERSOLENOIDITSPI ADJ. Idle Speeds Fuel Mixture you must refer to Engine Emission Control System Part 29-01 of this Volume or Part 50-29 of Volume 5. Specifications can be found an the engine emission decal and in the Ford Car Performance Specification book. Adjustment points for the YFA 1 -V Carburetor are shown in Figs. 1, 2, 3 and 4. FAST IDLE SPEED ADJUSTMENT Make certain the curb idle speed and

24-06-5 Model YFA 1-V Carburetor 24-06-5 NOTE: Do not push the linkage or the shaft of the motor itself, as this will actuate the modulator spring. * If the motor does not fully retract with vacuum, test the pulldown motor diaphragm for leakage. * If the vacuum pulldown motor diaphragm is DR I L L GAUGE leaking and the motor will not retract fully with RETAININGHOUSING SCREW vacuum, replace the motor. Warning: Insure that the choke plate linkage 3 PLACESI is no

24-06-6 Model YFA 1-V Carburetor 24-06-6 FLOAT DROP ADJUSTING TA BEND HERE TO ADJUST SCREW RETAINING PUMP DIAPHRAGM ‘SHAFT ROD ACTION CAUSED BY SCREW ACTING AS V144 5’ lB FIG. 10 Metering Rod Adjustment Main Body Gasket Replacement for the proper procedure. FLOAT DROP ADJUSTMENT V2079- iS 1. Remove the carbureto

24-06-7 Model YFA 1-V Carburetor 24-06-7 needle, pin spring, needle pin, float and lever METERING ROD ARM assembly and float pin Fig. 1 5. 3. Adjust the float level to specifications. METERINGROD 4, Install the carburetor air horn and gasket. SPRING LIFTER LINK CARBURETOR ASSEMBLY Removal PUMP DIAPHRAGM DIAPHRAGM Flooding, stumble on acceleration and other

24-06-8 Model YFA 1-V Carburetor 24-06-8 pump spring, the metering rod arm assembly, the 3. Install the metering rod an the metering rod arm anti-rock plate and the pump lifter link from the and place the looped end of the metering rod arm pump diaphragm shaft. Compress the pump spring on the metering rod as shown in Fig. 10. diaphragm spring. Remove the pump diaphragm Align the pump diaphragm with the diaphragm spring retainer, spring and pump diaphragm housing; make sure holes are aligned. Install the a5sembly from the pump diaphragm housing housing attaching screws to keep the diaphragm assembly Fig. 12. and housing aligned. Install the accel

24-06-9 Model YFA 1-V Carburetor 24-06-9 AIR CLEANER BRACKET 5CR EWS 5CR EW ANTI-STALL DASFIPOT CHOKE PLATE AIR HORN ASSEMBLY LEVER COIL HOUSING BAFFLE PLATE COIL HOUSING GASKET AIR

24-06-10 Model YFA 1-V Carburetor 24-06-10 valve plug from the outside main body casting. Loosen the bleed valve screw and remove the valve. 16. Remove the retaining screws and separate the throttle body flange assembly from the main body ANDTHROTTLELEVER ASSEMBLYSHAFT casting. Remove the body flange gasket. 17. Remove the throttle plate retaining screws. File the staked ends, if necessary, and use new screws upon SLOTTED assembly. Slide the throttle shaft and lever IDLE PORT assembly out of the throttle body flange assembly. Note the location of the ends of the torsion spring on the throttle shaft for prope

24-06-11 Model YFA 1-V Carburetor 24-06-11 13. Align the bowl vent flapper valve with the vent rod. the choke lever tang and is not stopped by a Make sure the spring is properly installed on the retaining tab on the baffle plate if equipped. vent rod shaft. Install the spring retainer. Install the retainers and housing screws. Set the coil 14. Position a new air horn gasket, the air horn housing index to specifications and tighten the assembly, and the solenoid bracket on the main screws. body. Install and tighten the attaching screws. 16. Install the air cleaner bracket. Install the fast idle NOTE: When installing the air horn ass

24-08-1 Holley Model 1946 1-V Carburetor 24-08-1 Holley Model 1946 24-08 1-V Carburetor Fairmant and Zephyr SUBJECT PAGE SUBJECT PAGE DESCRIPTION 08-1 ADJUSTMENT Corit’d. OPERATION Curb Idle Speed TSP ON 08-5 Accelerator Pump System 08-4 Dechoke OS-S Automatic Choke System 08-5 External Fuel Bowl Vent 08-7 External Fuel Bawl Vent System 08-4 Fast Idle Ca

24-08-2 Halley Model 1946 1-V Carburetor 24-08-2 located venturi contains two venturi vacuum boosters CANISTER VENT HOSE MECHANICALand the main discharge passage. The accelerator pump CONNECTIONwell, passages, check ball and weight, main metering VENTFUEL BOWL jet, enrichment valve, idle tube and hot idle HO

_____ 24-08-3 Holley Model 1946 1-V Carburetor 24-08-3 AIR MAIN METERING SYSTEM As engine speed increases, air flow through the carburetor increases, causing lower pressure in the venturi Fig. 7. Near atmospheric pressure, present in the fuel bowl above the fuel, causes the fuel to flow to the lower pressure created at the venturi. This venturi action is increased by the us

24-08-4 Holley Model 1946 1-V Carburetor 24-08-4 MANI FOLD VACUUM ACCELERATOR PUMP PUMP OPERATING DRIVE ROD SPRING PUMP PISTON AND PUMP

24-08-5 Halley Model 1946 1-V Carburetor 24-08-5 AUTOMATIC CHOKE SYSTEM The automatic choke system Fig. 11 provides the sufficient amount to let the engine run without flooding richer air/fuel mixture required for starting and out. The amount of choke opening depends on the operating a cold engine. temperature of the bimetal spring, since the closing A bimetal spring inside the choke housing, which is force of the bimetal is opposed by a "modulating" part of the air horn assembly, begins to exert closing spring within the pulldawn motor. This type of system pressure on the choke valve at temperatures below is thus called a ‘modulated choke pulldown’ system. approximately 75°F. As the temperature drops, clo

24-08-6 HoIley Model 1946 1-V Carburetor 24-08-6 TSP end and a screwdriver slot on the other end, to 1. With the fast idle speed adjusting screw contacting provide for adjustment with the air cleaner assembly in the second highest step of the fast idle cam position. When adjusting from the TSP end, turn the kickdawn step, move the choke plate toward the screw counterclockwise to increase idle speed. When closed position with light pressure on the choke using the screwdriver slot end, turn the screw clockwise lever or choke plate. ta increase idle speed. 2. Check the fast idle cam setting using the LOW IDLE SPEED TSP OFF ecified size gage or drill bit b

24-08-7 HoIley Model 1946 1-V Carburetor 24-08-7 2. Insert the specified size gage or drill bit between gage or drill bit of the specified diameter to check the the upper edge of the choke plate and the inner clearance between the top of the choke plate and the wall of the air horn. air horn. FOLLOW THE PROCEDURE IN PART 29-02 3. With light pressure against the choke shaft lever, OF THIS MANUAL. a slight drag should be felt as the gage or drill bit is withdrawn. 4. To adjust, bend the unloader tab of the throttle EXTERNAL FUEL BOWL VENT lever until the correct opening is obtained. The tab Adjust the external fuel bowl vent Fig. 16

24-08-8 HoIley Model 1946 1-V Carburetor 24-08-8 AOJU$TNG 5CR ER VENT ARM ADAPTER HAND VACUUM PUMP 7’2-OOI4 OR EOUFVALEN H

24-08-9 Holley Model 1946 1-V Carburetor 24-08-9 2. Connect the fuel line, throttle cable, choke heat 4. Install the air cleaner assembly. tube, distributor vacuum line, EGR vacuum line and 5. Adjust the curb idle speed TSP 0 N, slow idle the venturi vacuum line, speed TSP OFF and fast idle speed as necessary, 3. Connect the choke clean air hose to the air horn, following procedures in Parts 29-02 and 50-29 of Connect the TSP electrical connection and the this Manual. choke heater wire. DISASSEMBLY AND ASSEMBLY GENERAL To make overhaul easier, and to help prevent with a plast

24-08-10 Holley Model 1946 1-V Carburetor 24-08-10 I. SCREW 2. BOWL VENT COVER 3- VENT COVER GASKET

24-08-11 Holley Model 1946 1-V Carburetor 24-08-11 cutting a 1/16-inch wide by 3/8-inch deep slot in 2. Position the throttle body and gasket on the the blade. The slot will provide clearance for the inverted main body and install the three 3 throttle enrichment valve stem. body attaching screws. Tighten securely. 6. Remove the two hot idle compensator cover 3. Position the hat idle compensator valve gasket and attaching screws, the cover, the HIC valve and the valve in the main body. The valve is held in gaskets from the main body. position on its seat by the cover. Place the cover 7. Remove the three main body to throttle body and gasket over th

24-08-12 Nolley Model 1946 1-V Carburetor 24-08-12 10. Place the fast idle cam link in position so that the link engages the fast idle cam slot. install the cam and retainer. Install the choke control lever and screw. 11. Position the bowl vent assembly and hinge pin in the housing and install the hinge pin attaching screw. Place the small diameter of the bowl vent spring over the shoulder of the vent arm. Position the cover and gasket and install the three 3 cover attaching screws. 12. Connect the choke pulldown diaphragm linkage and install the two 2 diaphragm bracket attaching screws. Reinstall the vacuum hose from the manifold vacuum tube to the diaphragm assembly. 13. Position the choke bimetal cap gasket in the choke housing. I

24-10-1 Model 5200 2-V Carburetor 24-10-1 PART Model 5200 2-V Carburetor 24-10 2.3L l4 Engine SUBJECT PAGE SUBJECT PAGE DESCRIPTION ADJUSTMENTS Cont’d. General 10-1 Fast Idle Cam Clearance 10-3 Fuel Bowl Vent 10-1 Secondary Throttle Stop Screw 10-4 ADJUSTMENTS DISASSEMBLY AND ASSEMBLY Choke Plate Vacuum Pulidown 10-3 Disassembly

24-10-2 Model 5200 2-V Carburetor 24-10-2 SGLENOI D:KICKE P THROTTLE POSITIONED ISTPI Tsp GFF IDLE SPEED A DJ LJST INC SCREW VACUUM KICKER DASH PG T SOLENO

24-10-3 Model 5200 2-V Carburetor 24-10-3 TO AIR CLEANER EXTERNAL VENT PASSAGE TO INTERNAL VENT CANISTER PASSAGE V2322-1A FIG. 5 Switching Bowl Vent ADJUSTMENTS Most carburetar adjustments are factory set, and based on guidelines determined for reduced engine emission. In order to adjust: A

24-10-4 Model 5200 2-V Carburetor 24-10-4 5. Remove the slack from the choke linkage by of the float and the bowl cover Fig. 11. To adjust the attaching a rubber band to the choke operating clearance, bend the float tang up or down as required lever as shown in Fig. 10. Fig. 12. Do not scratch or damage the tang. 6. To adjust the choke plate-to-air horn clearance, turn Adjust both floats equally. the vacuum diaphragm adjusting screw in or out as SECONDARY THROTTLE STOP SCREW required Fig. 10. 1. Back off the secondary throttle stop screw until the

24-10-5 Model 5200 2-V Carburetor 24-10-5 DROP AOJUSTING TANG FIG. 12 Float Adjustment FIG. 13 Secondary Throttle Stop Adjustment DISASSEMBLY AND ASSEMBLY DISASSFMBLY B. Remove E-clip from vent diaphragm stem and remove diaphragm assembly, vent spring, vent Refer to Fig. 14 for the disassembled view of the valve retainer and vent valve. carburetor. BOWL COVER

24-10-6 Model 5200 2-V Carburetor 24-10-6 BOWL VENT SOLENOID ASSY SPRING MAIN WELL TUBE EXTERNAL

24-10-7 Model 5200 2.V Carburetor 24-10-7 5. Remove the choke diaphragm cover screws and 8. Remove the idle adjusting lever spring and shaft cover, return spring, diaphragm and rod assembly. washer. Note how the primary throttle return spring is hooked over the idle adjusting lever ACCELERATOR PUMP and the carburetor body. 1. Remove the four pump cover screws and pump 9. Remove the idle speed screw and spring from the cover assembly. Remove the pump diaphragm idle adjusting lever. assembly and pump return spring. 10. Remove the secondary throttle lever nut, 2. Remove the pump discharge screw assembly and lockw

24-10-8 Model 5200 2-V Carburetor 24-10-8 3. Install the washer, primary throttle return spring SECONDARY VENTURI and idle adlusting lever and lever bushing. Install the secondary operating lever assembly Fig. 14. PRIMARY 4. Install the flat washer and primary throttle lever. VENTURI Install the lockwasher and nut. Attach the MAIN BQOYi secondary operating lever return spring. 5. Install the idle mixture adjusting needle and spring. Turn it in until it lightly bottoms. Back out the screw V the exact number of turns recorded at disassembly. N Install a new limi

24-12-1 Holley/Weber Model 6500 Feedback Carburetor 24-12-1 Holley/Weber Model 24-12 6500 Feedback Carburetor Pinto and Bobcat with 2.3L 1-4 California Only SUBJECT PAGE SUBJECT PAGE DESCRIPTION 12-1 ADJUSTMENTS 12-3 CA4501-2A DESCRIPTION GENERAL Pinto and Bobcat vehicles manufactured for sale in California and equipped with the 2.31 1-4 engine are also equipped with a Feedback Electronic Engine Con trol system. This system requires more precise fuel metering than is pos

24-12-2 Holley/Weber Model 6500 Feedback Carburetor 24-12-2 VACUUM VALVE SPRING PISTON AND DIAPHRAGM ASSEMBLY HIGH SPEED AIR BLEED CONTROL VACUUM INLET FUEL BGWL METERING ROD PRIMARY VENTURI RESTRICTOR

24-12-3 Holley/Weber Model 6500 Feedback Carburetor 24-12-3 ADJUSTMENTS All adjustments for the Model 6500 Feedback car 5. Remove the slackfrom the choke linkage by attach buretor are the same as those included in Part 24-10 ing a rubber band to the choke operating lever as for the Model 5200 carburetor, except Choke Plate shown in Figure 3. Vacuum Pulldown. The Model 5200 is equipped with a 6. Ia adjust the choke plate-to-ak horn clearance, new external connection for vacuum, while the Model turn the vacuum diaphragm adjusting screw in or 6500 carburetor is equipped with internal passages out as required Fig. 4. and requires different adjustment procedures. For all other adjustm

24-25-1 Model 2150 2-V Carburetor 24-25-1 PART Model 2150 2-V Carburetor 24-25 2.81, 5.01 302 dO Except California. 5.81/6.61 351W. 351M dID, 400 CID SUBJECT PAGE SUBJECT PAGE DESCRIPTION 25-1 REMOVAL AND INSTALLATION Cont’d. Air Horn to Main Body Gasket 25-8 DIAGNOSIS AND TESTING 25-5 Carburetor Assembly 25-7 Choke Pulldown Diaphragm Assembly 25-9 ADJUSTMENTS

24-25-2 Model 2150 2-V Carburetor 24-25-2 POSITIVE TEMPERATURE COEFFICIENT PTC CERAMIC NEATER MECHANICAL HIGH SPEED BLEED CAM T!MPERATURE SOLENOID-DASHPOT THRDTTLE EDSITIONER BIMETALLIC DISC

24-254 Model 2150 2-V Carburetor 24-25-3 throttle plates are opened still wider, and the engine FLOAT speed increases, the air flow through the carburetor also INTERNAL increases. This creates a vacuum in the booster venturi FUEL BOWL VENT strong enough to bring the main fuel system into operation. Fuel flow from the idle system tapers off as FUEL BOWL

24-25-4 Model 2150 2-V Carburetor 24-25-4 HIGH SPEED BLEED SYSTEM HIGH SPEED CODE AIR The mechanical high-speed bleed system provides AIR BLEED HOLE --2 close control over fuel mixture by providing a direct link SPRING ! FUELAIR-FUEL between air-fuel rotio and throttle plate position. When TAPERED the throttle plate is closed, the cam does not contact lift rod. When the throttle starts to open the cam engag

24-25-5 Model 2150 2-V Carburetor 24-25-5 operation places a greater load on the engine, and system compensation. The main system compensation manifold vacuum drops below a predetermined value, discharges venturi bypass air into the throttle bores the spring opens the enrichment valve. Fuel from the fuel above the throttle plates, leaning out the mixture as bowl flows through the enrichment valve and into required by altitude conditions. Air flow is controlled by passages leading to the main fuel well. Here the a valve activated by an aneroid attached to the rear additional fuel is added to the fuel from the main fuel of the carburetor main body. system, enriching the mixture. As engine power demands are reduced, manifold vacuum increases. The

24-25-6 Model 2150 2-V Carburetor 24-25-6 LIMITER STOPS VIBS7-1B VIRgO-lB FIG. 13 Idle Fuel Mixture Adjusting Screw FIG. 16 Accelerator Pump Stroke Adjustment Limiters and Stops -MEASURE CLEARANCE BOTTOM EDGE OF CHOKE VALVE TO WALL OP AIR HORN

24-25-7 Model 2150 2-V Carburetor 24-25-7 FUEL LEVEL FLOAT ADJUSTMENT-DRY 4. While the engine is idling, use a standard depth scale to measure the vertical distance from the top The dry float adjustment is a preliminary fuel level machined surface of the carburetor main body to adjustment only. The final adjustment Fuel Level Float the level of the fuel in the fuel bowl Fig. 20.Adjustment-Wet must be made after the carburetor The measurement must be made at least 1/4 inch is mounted on the engine. away from any vertical surface to assure an With the air horn removed, the float r

24-25-8 Model 2150 2-V Carburetor 24-254 1. Remove the air cleaner. FLOAT, NEEDLE VALVE AND SEAT, INLET 2. Remove the throttle cable from the throttle lever. SCREEN OR MAIN JETS Disconnect all vacuum lines, emission hoses, the fuel Removal line, electrical connection and the choke heat tube 1. Remove the carburetor air horn following the at the carburetor. procedure under Air Horn to Main Body Gasket3. Remove the carburetor retaining nuts; then remove Replacement. the carburetor. R

24-25-9 Model 2150 2-V Carburetor 24-25-9 2. Position the new accelerator pump diaphragm assembly to the cover and place the cover and diophragm assembly in position on the return spring and main body. The large end of the spring must face the Elastomer valve. Install the cover screws fingertight. Push the accelerator pump cover against the main body and tighten the cover screws. 3. Position the accelerator pump operating rod in the hole in the pump operating arm. 4. Adjust the accelerator pump stroke to specification by installing the accelerator pump rod in the proper hole in the overtravel lever. Position the rod retainer over the proper hole and insert the end of the rod through the hole in the retainer. Snap the end of

24-25-10 Model 2150 2-V Carburetor 24-25-10 choke housing assembly, gasket and the fast idle 4. Remove the accelerator pump operating rod from cam and rod from the fast idle cam lever. the overtravel lever and the retainer. To release the operating rod from the overtravel lever retainer,4. Remove the choke lever retaining screw and press upward on that part of the retainer that snaps washer. Disconnect the choke control rod from the aver the rod. Disengage the rod from the retainer choke lever. Remove the choke lever and fast idle

24-25-11 Model 2150 2-V Carburetor 24-25-11 8. Remove the idle fuel mixture adjusting screws shaft into proper position, rotating as necessary to needles and the springs. Remove the limiters from properly position cam. the adjusting screws. 3. Refer to the lines scribed on the throttle plates and 9. If necessary, remove the nut and washer securing install the throttle plates in their proper location the fast idle adjusting lever asssembly to the with the screws snug, but not tight. Always use new throttle shaft, and remove the lever assembly. If screws when installing throttle plates. necessary, remove the idle screw and the

24-25-12 Model 2150 2-V Carburetor 24-25-12 HIGH-SPEED BLEED METERING ROD YOKE AND LIFT ROD BOOSTER VENTURI SCREW GASKET WEIGHT ACCELERATING PUMP -CHARGEBALLcHECK NOZZLE BAR. HIGH-SPEED

24-25-13 Model 2150 2-V Carburetor 24-25-13 16. Insert the float assembly into the fuel bowl and AIR HORN hook the float lever tab under the fuel inlet needle Refer to Fig. 27 for the correct location of the parts. assembly. Insert the float shaft into its guides at the If removed, position the bypass air choke plate sides of the fuel bowl. shaft through the air horn, then install the bypass 17. With a screwdriver, position the float shaft retainer choke plate. Before tightening the mounting screws, in the groove on the fuel inlet needle seat Fig. 23. check for proper fit an

24-26-1 Model 4350 4-v Carburetor 24-26-1 PAHT Model 4350 4-V Carburetor 24-26 7.5L 460 C.I.Dj V-B SUBJECT PAGE SUBJECT PAGE DESCRIPTION ADJUSTMENTS Cont’d. Delayed Choke Pulidown and Fast Idle Mechanical- Fuel Bowl Vent Valve 26-5 Top Step Pullott 26-2 Vacuum Piston and Metering General 26-1 - -

24-26-2 Model 4350 4-V Carburetor 24-26-2 PCV CVNNE C I VENTURI VACUUM - SOME APPLICATIONS ROT IDLE COMPENSATOR / FIG. 4 Split Secondary Throttle Shaft J CV.JNDE° v1916-2C FIG. 3 Model 4350 4-V Carburetor-Top View SHOWN.ETERINGIN RDD. Without Altitude Compensation JPWARI P positioned according to throttle plate opening Figs. 5 and 30. A lever on the acceleration pump operating shaft moves upward as the throttle is opened. Under high engine vacuum conditions

24-26-3 Model 4350 4-V Carburetor 24-26-3 supplied to the PTC ceramic heater. As the heater warms, it causes the thermostatic spring to pull the choke plate open within 70 seconds. For test and adjustment information, refer to this Part and to Part 50-29. DELAYED CHOKE PULLDOWN AND FAST IDLE TOP STEP PULLOFF The Motorcraft 4350 4-V carburetor is equipped with a unique, vacuum-operated delayed choke pulldown diaphragm. This system operates in addition to the usual choke pulldown system in the choke housing. The remotely-mounted delayed choke pulldown diaphragm assembly is connected to the automatic choke linkage by an override linkage Fig. 7. CHOKE DELAYED When the engine is first started, the piston inside the

24-26-4 Model 4350 4-V Carburetor 24-26-4 THROTTLE POSITIONER ADJUSTMENT EITHER END TSP ‘ON CURB IDLEI V1921-IA FIG. 10 Idle Speed Adjustment Points-Vehicles With Solenoid Throttle Positioner FIG. 9 Idle Fuel Mixture Adjusting Screws, Limiters and Stops Disconnect the accelerator pump from the operating arm by holding downward on the spring and sliding the

24-26-5 Model 4350 4-V Carburetor 24-26-5 ACCELERATOR PUMP CAPACITY ADJUSTING SCREW THROTtLE LEVER ASSEMBLY - 9581 ACCELERATOR PUMP ASSEMBLY -9E528 VACUUM PISTON LEVER AOJIJSTMENT - 9! V1924-2C FIG. 13 Throttle-To-Accelerator Pump Linkage 9. With the throttle lever at the idle position, measure

24-26-6 Model 4350 4-V Carburetor 24-26-6 DRILL GAUGE OF SPECIFIED retaining screws and rotate cap 90 degrees in the CLEARANCE SIZE TAPER-LOCK CHOKE SHAFT closing rich direction. SCREW ILEFT HAND THREADI 2. Disconnect the vacuum supply hose from the port on the delayed choke pulldown diaphragm / assembly. Place a piece of tape over the purge hole after removing the filter cap and connect a vacuum AST

24-26-7 Model 4350 4-V Carburetor 24-26-7 FIG. 17 Fast Idle Top Step Pulloff Linkage FIG. 18 Checking Dechoke Clearance Rotate the spring housing an additional 90 degrees counterclockwise and tighten the attaching screws. 2. Position the fast idle speed, adjusting screw end on the kickdown center step of the fast idle cam. PRIMER Close the choke plate as far as it will go. Check the clearance between the lower edge of the choke plate and the air horn wall. Turn the fast idle cam adjusting screw inward to increase the clearance or outward to decrease the clearance. Make sure the fast idle speed adjusting screw stays at the kickdawn step of the fast idle cam during the ad

24-26-8 Model 4350 4-v Carburetor 24-26-8 nose pliers Is used, the tab could be scratched or To bend the tabs with the float bending tool, the otherwise marred, resulting in a sticking float. procedure is as follows: Refer to MAJOR REPAIR OPERATIONS for To Raise the Float, insert the open end of the disassembly of the Model 4350 4V carburetor. Pay bending tool to the RIGHT side of the float lever particular attention to instructions for scribing reference tab and between the needle and float hinge. Raise lines on the accelerator pump operating arm shaft and the float lever off the needle and bend the tab the carburetor air horn Casting. This relationship must downward. To Lower the Float, insert the open b

24-26-9 Model 4350 4-V Carburetor 24-26-9 Fuel Inlet Needle Drop Limiter Adjustment floats and inlet needle drop limiter. Make sure foot of needle drop limiter is behind tab of vacuum All model 4350 4V carburetors except Police piston limiter lever.Interceptor models are equipped with a new fuel inlet needle drop limiter. The limiter Fig. 24 Controls fuel VACUUM PISTON AND METERING RODS inlet during stops and turns to help prevent engine ADJUSTMENT stalling and must be installed and ajusted correctly Improper adjustment con result in engine stalling or fuel There are no "driveability" adjustments to be st

24-26-10 Model 4350 4-V Carburetor 24-26-10 REMOVAL AND INSTALLATION Removal 5. Remove the carburetor spacer, f equipped, the carburetor and spacer gasket from the intake Flooding, stumble on acceleration and other manifold. performance complaints are in many instances caused by foreign matter in the carburetor. To aid in diagnosing Installation the cause of complaint, the carburetor should be 1. Clean the gasket surfaces of the spacer and carefully removed from the engine without removing the carburetor. Place the spacer between two new fuel from the bowl. The contents of the bowl can then gaskets and posit

24-26-11 Model 4350 4-V Carburetor 24-26-11 valve plate, then remove the air valve damper Fig. 32. Record the dimension for reference piston rod and spring. during assembly. With a pair of needle-nosed 10. If it is necessary to remove the secondary air valve pliers, remove the vacuum piston stop nylon from plates or shaft proceed as follows: Do not perform the channel in the main body casting. this operation with carburetor on engine, as 3. Remove the main metering vacuum piston and fuel parts may fall through to intake manifold. metering rods as an assembly. DO NOT DISTURB Remove the C-clip from the secondary air valve SETTING OF PISTON ADJUSTMENT SCREW OR plate link

24-26-12 Model 4350 4-v Carburetor 24-26-12 3. Remove the choke piston lever retaining screw, then remove the piston assembly. 4. Remove the retainers from the secondary throttle lever to primary throttle connecting link, then remove the link. 5. If it is necessary to remove the throttle plates or shafts from

24-26-13 Model 4350 4-V Carburetor 24-26-13 SCREW C-CLIP VENT VALVE ALTITUDE COMP ADJUSTING ‘CHOKE PLATE LINK DAMPER SCREW AIR SCREW LINK VALVE LINK CHOKE PLATE

Model 4350 4-V Carburetor 24-26-1424-26-14 RETAINER SCREW AIR C-CLIP OPERATING VALYC ARM LINK 1t VENT VALVE ADJUSTING DAMPER SCREW LINK P LATE

24-26-15 Model 4350 4-v Carburetor 24-26-15 upward and toward the rear of the carburetor. C Install the new attaching screws snugly but not tight. Position and check as with the primary throttle plates, Make sure return springs operate in a closed direction. 9. If the fast idle cam and bushing were removed, insert the automatic choke shaft bushing through the choke housing. Position the fast idle cam between the choke housing and bushing column. Slide the bushing through the fast idle corn. Press the bushing in the choke housing and into the column. Clean the bushing with a 1/4-inch reamer. FLATTEN END 10. Insert the automatic choke shaft and

24-26-16 Model 4350 4-V Carburetor 24-26-16 SHAFT 10. Position float and lever assembly between hinge post and over fuel inlet valves. 11. Insert the float hinge pin through the post and float lever. The pin must be inserted from the accelerator pump plunger side for self VACUUM retentlan. 12. Position return spring over air valve damper rod.

24-26-17 Model 4350 4-v Carburetor 24-26-17 A4291-IA FIG. 39 Adjusting Accelerator Pump Nylon Arm "This publication contains material that is reproduced and distributed under a license to Detroit Iron from Ford Motor Company. No further reproduction or distribution of the Ford Motor Company material is allowed without the express written permission of Ford Motor Company."

24-27-1 Motorcraft Model 2700 VV Carburetor 24-27-1 Motorcraft Model 24-27 2700W Carburetor Pinto, Bobcat, Mustang II, Granada, Monarch and Versailles SUBJECT PAGE SUBJECT PAGE GENERAL INFORMATION 27-1 ADJUSTMENTS Cont’d. OPERATION Fast Idle Cam 27-7 Accelerator Pump System 27-5 Fast Idle Speed 27-7 Altitude Compensation 21-6 Float Drop 27-9 Cold Enrichment System

24-27-2 Motorcraft Model 2700 VV Carburetor 24-27-2 HOT IDLE COMPENSATOR V 2060-10 FIG. 1 Motorcroft Model 2700 VV Carburetor- 3/4 Front View V206 1.1 B FIG. 2 Motorcraft Model 2700 VV Carburetor- 3/4 Rear View "This publication c

24-27-3 Motorcraft Model 2700 VV Carburetor 24-27-3 OPERATION FUEL INLET SYSTEM The fuel inlet system has a single suspended float. All applications use an integral filter at the fuel inlet. The float and lever assembly controls fuel inlet through a single inlet valve and seat assembly Fig. 3. The needle valve riding on the float lever reacts to changes in fuel level, admitting enough fuel to replace that used. MAIN METERING SYSTEM The pressure drop caused by airflow past the fuel discharge nozzles causes solid fuel to flow from the fuel bawl, up the main well tubes, through the main metering jets and into the venturi Fig. 4. FUELFITTINGFILTER The fuel flow rate is controlled by tapered

24-27-4 Motorcraft Model 2700 VY Carburetor 24-27-4 The volume of fuel flowing in the system is controlled by the position of the solenoid valve and the position of the bimetallic valve. Some carburetors also have a small bypass restrictor located in the bottom of the fuel bowl which allows fuel to flow even if the bimetallic valve is closed, to aid in hot engine starting. When the ignition switch is in the START position, WOT STOP the cranking enrichment solenoid is energized, allowing LIMITER fuel to flow in the cranking enrichment system if th! LEVER fuel bowl temperature is below 750 and the cranking fuel control valve is open. Fuel flows from the fuel bowl through the cranking

24-27-5 Motorcraft Model 2700 VV Carburetor 24-27-5 control vacuum circuit and allows the control of the As the throttle is opened, and the pump piston is venturi valve to return to normal as described under driven downward, pressure developed in the cavity main metering system Fig. 10. As the CVR rises the cold seals the cup against the piston causing the fuel to flow. enrichment rod is lowered until it is seated in its jet An anti-syphon check boll and weight, located in the shutting off the cold enrichment fuel. up channel are unseated and fuel is delivered through the pump discharge nozzles in the venturis. When the

24-27-6 Motorcraft Model 2700 VV Carburetor 24-27-6 capability Fig. 14. The normally closed bimetal valve and opens the pintle valve according to this pressure. opens at a predetermined temperature, allowing Opening the valve allows control vacuum to lower the additional air to flow through a drilled passage and be pressure in the fuel bowl area, causing the fuel mixture discharged below the throttle plates. to be leaner. NOTE: The compensator assembly shown in Fig. 15 is rotated out of position for clarity. It is AUTOMATIC ALTITUDE COMPENSATION actually located just forward of the choke housing on

24-27-7 Motorcraft Model 2700 VV Carburetor 24-27-7 ACCELERATOR PUMP/INTERNAL VENT PISTON PINTLE VALVE V2409-2A FIG. 15 Automatic Altitude Compensation ADJUSTMENTS Before making any adjustments with the engine INTERNAL VENT running, set the vehicle parking brake and/or block the wheels. If the vehicle has a vacuum parking brake 1. Set the curb idle speed to specification. release, disconnect the line to the parking brake control 2. Place a .010" feeler gauge between the and plug th

24-27-8 Motorcraft Model 2700 VV Carburetor 24-27-8 VACUUM KICKER WITHOUT SO LA-DASH THROTTLE THRU ADJUST POSITIONER SOLENOID THRU ADJUST V 22 34-26 FIG. 16 Throttle Positioners 010 STATOR CAP T77L-9848-A

24-27-9 Motorcraft Model 2700 VV Carburetor 24-27-9 4. To adjust, bend the float operating lever away from the fuel inlet needle to decrease the setting and toward the needle to increase the setting. FAST IDLE 5. Check and/or adjust the float drop. LEVER NOTE: The float pontoon must be parallel with the gasket. FLOAT DROP 1. Fabricate a gauge to the specified dimension. 2. With the upper body assembly held in the upright position, place the gauge against the cast surface of the upper body NOT ON THE GASKET and measure the vertical distance between the cast surface of the upper body and the bottom of the float Fig. 22. 3. To adjust, bend the stop tab on the float lever away from the hinge

24-27-10 Motorcraft Model 2700 VV Carburetor 24-27-10 2. Press down on the CVR rod until it bottoms on its 3. Hold throttle closed firmly to maintain Steps 1 and seat Fig. 24. Read the downtravel on the dial 2. indicator. If it is not within specification adjust as 4. Remove diaphragm cover and adjust diaphragm follows: assembly clockwise until lightly bottomed on 3. Place a 3/8" box end wrench over the CVR casting, then rotate counterclockwise 1/2 to 1-1/2 adjusting nut to prevent turning. turn, until the vacuum port and diaphragm hole line 4. Using a 3/32" Allen wrench turn the CVR rod up. counterclockwise to increase the travel and

24-27-11 Motorcraft Model 2700 VV Carburetor 24-27-11 DISASSEMBLY AND ASSEMBLY To facilitate working on the carburetor and 18. Push the venturi pivot pins out and slide the venturiprevent damage to the throttle plates, the carbure valve to the rear until it is free of the casting. 32,tor should be placed on a carburetor stand. If a 33proper stand is not available use four 4 bolts 19. Remove the venturi valve pivot pin bushings. 345/16 x 2-1/2 inch as legs. Install nuts on the bolts

24-27-12 Motorcraft Model 2700 VV Carburetor 24-27-12 1 FUEL INLET F IITING. IS. ACCELERATOR PUMP LINK 35. METERING ROD PIVOT PIN 2. FUEL INLET PITTING GASKET 9 ACCELERATOR PUMP SWIVEL 36. METERING ROD. 2 FUEL FILTER. 70. NUT NYLON 37 METERING ROD SPRING. 4, FUEL FILTER SPRING. 21. CHOKE HINGE PIN 38 CUP PLUG. S I’S RETAINING ERING. 27. COLD ENRICHMENT ROD LEVER. 39. MAIN METERING JET

24-27-13 Motorcraft Model 2700 VY Carburetor 24-27-13 BRASS JET PLUG TOOL TAP HERE V22491A FIG. 27 Removing Cold Enrichment Rod FIG. 29 Removing Cup Plugs Assembly and CVR Assembly

24-27-14 Motorcraft Model 2700 VV Carburetor 24-27-14 MAIN BODY CRANKING ENRICHMENT 10 WIDE OPEN STOP SCREW, SOLENOID. Ii. PLUG EXPANSION 2 ‘0 RING SEAL 12. CRANKING FUELCONTROL 3. SCREW 141 8-321< .56 ASSEMBLY.

24-27-15 Motorcraft Model 2700 VV Carburetor 24-27-15 1. THROTTLE RETURN CONTROL DEVICE. 21. CHOKE HEAT TUBE FITTING. 2. THROTTLE RETURN CONTROL DEVICE BRACKET. 22. CURB IDLE ADJUSTING SCREW TSP OFFI. 3. MOUNTING SCREW. 1042 X.50 23. RETAINING NUT. 10-32 4. ADJUSTING SCREW TSP ONI 24. FAST IDLE ADJUSTING LEVER. 5.6. SCREWNOT APPLICABLE131.8-321< SD19781 25.26. FASTFAST IDLEIDLE LEVER.ADJUSTING SCREW.

24-27-16 Motorcraft Model 2700 VV Carburetor 24-27-16 2. Place the throttle plates in the proper position NOTE: The scribed marks and turn the new screws in until they are snug but not tight. With the throttle closed, tap the plates lightly to insure proper centering and tighten the screws. Stake the screws carefully. 27, 28 3. Drive the new venturi valve limiter stop pin into the shaft. Leave approximately 1/8 inch exposed. 29 4. Install the fast idle lever, the fast idle adjusting lever, the throttle shaft retaining nut, and the fast idle adjusting screw. 23, 24, 25, 26 5. Install the T.S.P. Off idle speed adjusting screw. 22 6. If the bushing was removed, it must be carefully pressed into the housing and staked in place. The ca

24-27-17 Motorcraft Model 2700 VV Carburetor 24-27-17 9. Install the choke heat shield and attaching screw. 14. Install the accelerator pump link and the retaining 16, 17 pin. 17, 18 15. Install the accelerator pump operating rod and the Upper Body Fig. 26 dust seal. 6, 16 1. Install the 1 /8 inch pipe plug in the fuel inlet boss. 16. Install the fuel inlet valve seat gasket, the seat and 48 the valve. 13, 14, 15 2. Install the venturi valve limiter screw in the venturi 17. Install the float bowl gasket. 12 valve. 47

24-27-18 Motorcraft Model 2700 VV Carburetor 24-27-18 SPECIAL TOOLS DescrEption Number Pivot Pin Remover and Installer T1IL9928-A Choke Adjustment Tool Stator Capt T77L-9848-A Vacuum Test Tool T7JL-9510-A Jet Plug Remover T7IL-9533-B Jet Plug Installer T71L9533-C Metering Jet Adjustment Tool

24-30-1 Fuel Pump-Mechanical 24-30-1 PART Fuel Pump-Mechanical 24-30 All Models SUBJECT PAGE SUBJECT PAGE DESCRIPTION 30-1 REMOVAL AND INSTALLATION 30-2 TESTING SPECIFICATIONS 30-3 Capacity Volume Test 30-2 Pressure Test 30-2 CA4244-ZA DESCRIPTION A single action fuel pump mechanically oper

24-30-2 Fuel Pump-Mechanical 2440-2 TESTING FUEL OUTLET HOSE Incorrect fuel pump pressure and low volume capacity of flow rate ore the two most likely fuel pump troubles that will affect en9ine performance. Low pressure will cause a lean mixture and fuel starvation at high speeds. Excessive pressure will cause high fuel consumption and carburetor flooding. Low volume will cause fuel starvation at high speeds. To determine that the fuel pump is in safisfactory operating condition, tests for bath fuel pump pressure and fuel pump capacity volume should be performed. The tests are performed with the fuel pump installed on the engine and the engine ot normal operating temperature and at idle speed. Before

24-30-3 Fuel Pump-Mechanical 24-30-3 3. Connect the fuel inlet line or hose use a new clamp 4. Operate the engine and check for fuel leaks. on the hose and the outlet line. If a hose is used at the fuel pump connection, crimp the retaining clamp securely. SPECIFICATIONS FUEL PUMP-MECHANICAL FUEL PUMP-MECHANICAL Engine Static Pressure Mm. Volume Flow Eccentric Total Lift Litre C.LD. PSI ® ® Inches 2.3 5.0 -7.0 2 1 Pn.ln 255cc. .304 - .325

24-31-1 Fuel Pump-Electric 24-31-1 PART - Fuel Pump Electric 24-31 Vehicles w/7.5L 460 CID Police Interceptor V-B SUBJECT PAGE SUBJECT PAGE DESCRIPTION 311 DIAGNOSIS 313 REMOVAL AND INSTALLATION Fuel Pump 3L3 CA4489-2A DESCRIPTION An in-tank electric fuel pump Fig. 1 is used on all 7.5L 460 CID Police Interceptor V.8 equipped vehicles. The ci

24-31-2 Fuel Pump-Electric 24-31-2 IGNITION TO STARTER RELAY SWITCH IN START IN LINE 3A POSITION FUSE "C" DIODE "C" I1440W 51-H ELECTRIC FUEL PUMP IGNITION SWITCH IN

24-31-3 Fuel Pump-Electric 24-31-3 REMOVAL AND INSTALLATION RI OAT FUEL PUMP SLOT Fl OAT ROO Removal 1. Open the hood and install fender covers. Disconnect the positive battery cable. 2. Raise the vehicle on hoist. 3. Disconnect the fuel outl

2441-4 Fuel Pump-Electric 24-31-4 FIG. 6 In-line Fuse FIG. 8 Connection To Taillight Harness 7. Check power lead pink with black hash at fuel pump 3-way connector; check black wire for ground at fuel pump connector. 8. If 1 2V is present on pink/black hash wire and black wire is grounded, replace the fuel pump/sender

24-41-1 - Air Cleaner And Duct Systems 24-41-1 PART Air Cleaner and Duct Systems 24-41 All Models SUBJECT PAGE SUBJECT PAGE DESCRIPTION 41-1 REMOVAL AND INSTALLATION ConEd. Replacing Crankcase Ventilation T E STING Replacing Air Filter Element 41-3 Auxiliary Air Inlet Valve 7.5L 460 CID Police Interceptor V*8 41-2 SPECIFICATIONS 41-4 REMOVAL AN

24-41-2 Air Cleaner And Duct Systems 24-41-2 The positive crankcase ventilation PCV system takes Br-METAL SWITCH air in through a filter pack mounted in the outside skin of the air cleaner assembly and connected to the engine valve cover either through an elbow and grommet or through the PCV valve and oil filler cap. Police interceptor models feature an "auxiliory inlet

24-41-3 Air Cleaner And Duct Systems 24-41-3 B3169-2C FIG. 3 Air Cleaner With Auxiliary Air Inlet Valve and Vacuum Motor REMOVAL AND INSTALLATION REPLACING AIR FILTER ELEMENT Air filter to the bottom of the air cleaner body. Remove the air cleaner assembly cover and the Refer to Part 50.29 ‘Emissions Systems Maintenance filter element. Schedule" for frequency of filter inspection and/or Inspectionreplacement. Visually inspe

24-41-4 Air Cleaner And Duct Systems 24-41-4 3. On 7.51 460 CID P.1. V.8, connect the auxiliary air inlet valve vacuum motor hose. On 4. 1 1 250 CID 1-6 engines so equipped, connect the Cold AIR CLEANER Weather Modulator CWM vacuum hose. SHELL REF. 4. On 2.8L V-6 engines, connect the vacuum vent valve at the air cleaner assembly. Connect the TVS on those models so equipped. 5. On 2.311-4 engines, connect the vacuum hose from the duct vacuum motor. Connect the cold air intake tube to the air cleaner assembly at the flexible duct. Connect the crankcase ventilation hose to the air cleaner body. REPLACING CRANKCASE VENTILATION FILTER

24-50-1 Fuel Tanks and Lines 24-50-1 PART Fuel Tanks and Unes 24-50 All Models SUBJECT PAGE SUBJECT PAGE DESCRIPTION Al C OPERATION DIAGNOSIS 50-7 Auxiliary Fuel Tank 50-7 MAJOR REPAIR OPERATIONS Double Locking Fuel Cap 50-1 Auxiliary Fuel Tank 50-8 Fuel Tanks and Fillers 50-I Fuel Lines 56-9 Fuel Vapor Emission Co

24-50-2 Fuel Tanks and Lines 24-50-2 Not all of these components are used on any one system, since usage depends on the calibration of the complete vehicle. System control and operation are accomplished through six separate basic functions in the system which a re: a. Fill Control Vent System b. Tank Vapor Vent and Storage System c. Carburetor Cowl Vent and Storage System d. Pressure and Vacuum Relief System fuel cap e. Fuel Vapor Return System f. Fuel Vapor Purge System FILL CONTROL/VENT SYSTEM Fill limiting is accomplished through fill neck con figuration and/or internal vent lines within the fill neck TYPICALVAPOR VALVESECTIONAEM6LY WITH and tank. The vent system is designed to permit an

24-50-3 Fuel Tanks and Lines 24-50-3 FOR 5.0L1302 0.1.0.1 THERMAL V-S ENGINE ONLY VENT VALVE TO ENGINE SOLENOID VACUUM SOURCE VENT VALVE CARBURETOR PCV VALVE

24-50-4 Fuel Tanks and Lines 24-50.4 CARBURETOR VENTING the fuel bowl vent line when the engine is running, and returns to the normally open condition when the igni Fuel vapors which might otherwise collect in the tion switch is turned off. Fig. 6. carburetor bowl and pass directly into the atmosphere are Vented to the carbon canister when the engine is stopped. Flow 0f these vapors is controlled by the fuel bowl vent valve, the purge control valve, or the fuel VALVE SEAT bowl thermal vent valve, depending on the particular carburetor and engine calibration used. When the

24-50-5 Fuel Tanks and Lines 24-50-5 TOPCV LINE OPEN TO ATMOSPHERE UNTIL VACUUM CLOSES VALVE VACUUM FROM PURGE VALVE ACTUATING LINE CLOSES BLEED VALVE THERMACTOR IDLE VENT VALVE ITIVI

24-50-6 Fuel Tanks and Lines 24-50-6 AIR CLEANER ASSEMBLY on as the engine warms up, and allows the Purge Valve Auxiliary Fuel Bowl Vent Tube to close when the engine is turned off and vacuum is lost On some models, an Auxiliary Fuel Bowl Vent Tube is connected to the fuel bowl vent tube to vent the fuel PRESSURE AND VACUUM bowl when the internal fuel bowl vent or the solenoid RELIEF SYSTEM vent valve are closed and the thermal vent valve is also Sealed Fill Cap closed. An air filter is installed on the air cleaner end of the tube to make sure contaminants don’t enter the The fill cap is a sealed ca