Werkstatthandbuch Book 1 · Seiten 1201–1300

28-02-4 Positive Engagement Starter 28-02-4 JUMPER A spot burned on the commutator is caused by an arc formed every time the commutator segment, connected KEEP BOTH FIELD BRI.ISFIES LEAD‘aAND HOLDING COIL GROUND to the open circuit winding, passes under a brush. FAD AWAY FROM FRAME VOLTMETER ARMATURE AND FIELD GROUNDED CIRCUIT LEAD ®CONNECTPOSITIVE TO TEST

28-02-5 Positive Engagement Starter 28-02-5 FARIMONT AND ZEPHYR WITH 5.OL 302 00 V-S ENGINE SELF-Th*REA0INIG SCREW - 385022-ClOD Starter Removal 70-110 IN-LB 1. Disconnect negative battery cable. 2. Raise the vehicle on hoist. 3. Remove wishbone brace. 4. Remove starter ottaching bolts and remove starter assembly. 5. Disconne

28-02-6 Positive Engagement Starter 28-02-6 38440-5100 TOVER SCREW 106 -11134 MOTOR CONTACT POINT 3789-62-S. PIN 11059 11062

28-02-7 Positive Engagement Starter 28-02-7 USE ARBOR PRESS TO 6. Position the ground brushes to the starter frame and install the retaining screws. 7. Apply a thin coating of Lubriplote 777 or equivalent on the armature shaft splines. Install starter motor drive gear assembly to the armature shaft ond install a new stop ring. Install a new stop-

28-02-8 Positive Engagement Starter 28-02-8 3. Remove the pivot pin retaining the starter drive plunger lever and remove the lever. STARTER DRIVE ACTUATING COIL 4, Remove the drive gear stop ring retainer and stop ring from the groove in the armature shaft and AND HOLDING remove the drive gear assembly. 5. Apply a thin coating of Lubriplate 777 or equivalent on the armature shaft splines. Install the new drive gear assembly on the armature shaft and install o new stop ring. 6. Position the starter gear plunger lever on the starter frame and install the pivot pin. Be sure

28-02-9 Positive Engagement Starter 28-02-9 SPECIFICATIONS POSITIVE ENGAGEMENT STARTER fl - Positive Engagement Starter Motor Starter Brushes I Normal Miii. Current Draw Engine Stall Through Cable Under Normal Cran&ing Torque Max. No. Mfg. Wear Spring Bolt Mounting Attaching Dia. Load Speed @5 Volts Load Load Length Limit Tension Torque Bolt Torqut Screw Inches Amps rpnl FtLbs Amps Amps

29-00-1 Engine Emission Control Systems 29-00-1 I GROUP ENGINE EMISSION I

29-01-2 Emission Systems General Service 29-01-2 FORD MQTQR cQANY zol:LTyiuIuI jKI ,,:j,f*ki I-... B VACUUM DIAPHRAGML. igloo fAMILY LA UVIUI00OGA,AAR,0A1ALTST 04104 DIS?UC000T LI Ill 010 PANS. AUTO SPAR! Ft*0 A001F43 0 cu-ni YOLBIFIRI,.C0WJ1, L*SKII...C0..0I. AL I IT 1100 CZ 11001015040004000 FTFT ThANSMI55100 EM 000ThAL AllOt 000 59000 EMITIB rIMIMS+r S tTflt 0100101*0 rioiog *P 7- i&zsSTFA* 1405 St 11101

29-01-3 Emission Systems General Service 29-01-3 three- or four-port coolant temperature operated vacuum switching devices. A typical three-port PVS is used in the cooling system to increase engine idle rpm when the engine overheats Fig. 5. When cold, the 3-port PVS provides a path through the top and center ports. When hot, only the center and bottom ports are connected. In the case of the cooling PVS, this provides carburetor spark port vacuum to the distributor vacuum advance under normal cool conditions and switches to engine manifold vacuum for increased idle speed when the engine is abnormally hot. As soon as the engine cools off, carburetor spark port vacuum is once again selected and the idle speed decreases as the spark is retarded again. I DISTRIBUTOR VACUU

29-01-4 Emission Systems General Service 29-01-4 COLD START SPARK HOLD CSSH The Cold Start Spark Hold system provides momentary spark advance hold during acceleration when the engine is cold, and is used to provide improved cald engine acceleration. DRCV OR SPARK PORT When the engine coolant is less than 53°C 128°F, the CSSH PVS is closed and the distributor vacuum signal travels through the restrictor Fig. 9. At cold start, high vacuum acts on the distributor diaphragm, giving maximum spark advance. During cold acceleration, the high vacuum already in the distributor diaphragm is slowly bled down through the restrictor, providing a modified vacuum advance during the initial stage of acceleration.

_ 29-01-5 Emission Systems General Service 29-01-5 CHECK VALVE FILTER PACK SINTERED ORIFICE I U I CINTERFO ORIFICE TO

29-01-6 Emission Systems General Service 29-01-6 PREVENTS VACUUM SIGNAL OVERRIDE AND CONTINUES TO PROVIDE HEATED AIR TO THE CARBURETOR UNTIL THE COLD WEATHER MODULATOR REACHES 55°F AFTER WHICH THE BIMETAL SENSOR CONTROLS DUCT AND VALVE DOOR FUNCTION TO DUCT VALVE VACUUM MOTOR BIMFTAI SENSOR MANIPOI D VACIIIIM DURING COLD START CONDITIONS BYPASS CLOSED FULL

29-02-1 Engine Diagnosis and Service 29-02-1 PART Engine Diagnosis and Service 29-02 SUBJECT PAGE SUBJECT PAGE GENERAL INFORMATION 02-1 DIAGNOSIS PROCEDURES Procedure Index 02-62 DIAGNOSIS CHARTS Diagnosis Chart Index 02-2 CA4263-2A GENERAL INFORMATION The following information comprises the Engine service routines provided here ore the only authorized Diagnosis and Service procedures related to emission service pr

29-02-2 Engine Diagnosis and Service 29-02-2 DIAGNOSIS CHARTS ENGINE DIAGNOSTIC CHARTS COMPLAINT PAGE - Engine will not crank - starter spins 02-3 Routine 101 Routine 102 - Engine Will Not Crank 02-4 Routine 103 - Engine Cranks Slowly 02-6 Routine 104 - Engine Cranks Normally - Will Not Start 02-7 Routine 105 - Engine Cranks Normally - Starts Hard When Cold 02-9

_____ ______ 29-02-3 Engine Diagnosis and Service 29-02-3 ROUTINE NO. 101 ENGINE WILL NOT CRANK - STARTER SPINS VERIFY THE COMPLAINT t REMOVE STARTER AND INSPECT FOR BROKEN OR WORN STARTER DRIVE. NOT OK OK t

_ 29-024 Engine Diagnosis and Service 29-02-4 ROUTINE NO. 102 ENGINE WILL NOT CRANK VERIFY THE COMPLAINT f PERFORM 550-2 STEF 1 IF A COLD START SPARK ADVANCE IS USED. CHECK THE TRANSMISSION NEUTRAL SWITCHES FOR PROPER OPERATION IF APPLICABLO. NOT 0K OK REPAIR OR ADJUST AS CHECK CABLE

29-02-5 Engine Diagnosis and Service 29-02-5 ROUTINE NO. 102 ENGINE WILL NOT CRANK - CONTINUED NOT OK MOVE VOLTMETER POSITIVE LEAD TO BATT’’C TERMINAL OF RELAY, OK NO VOLTAGE - CLEAN CONNECTIONS OR VOLTAGE STAYS THE SAME - MOVE VOLTMETER REPLACE CABLE AS REQUIRED. POSITIVE LEAD TO"S"T

___ 29-02-6 Engine Diagnosis and Service 29-02-6 ROUTINE NO. 103 ENGINE CRANKS SLOWLY VERIFYTHECOMPLAINT I 1 PERFORM BATTERY CAPACITY TEST, NOT OK OK RECHARGE AND RETEST BATTERY, PERFORM SSD’2 STEP I IF A COLDSTARTSPARK ADVAMCE IS USED,

_________________________________________________________________________ 29-02-7 Engine Diagnosis and Service 29-02-7 ROUTINE NO. 104 ENGINE CRANKS NORMALLY - WILL NOT START VERIFY THE COMPLAINT USING THE CORRECT STARTING PROCEDURE AND CHECK FOR FLOODING. VISUALLY INSPECT VACUUM HOSES, ELECTRICAL WIRING. FUEL SYSTEM AND AIR CLEANER FOR LEAKS, DAMAGE. BLOCKAGES. AND PROPER CONNECTIONS. ALSO CHECK FOR FUEL IN TANK,

______________ ___ 29-02-8 Engine Diagnosis and Service 29-024 ROUTINE NO. 104 ENGINE CRANKS NORMALLY - WILL NOT START - CONTINUED OK NOT OK OK REPAIR AND/OR REPLACE AS REQUIRED, ECHECK BASIC TIMING WHILE CRANKING. NOT OK OK REPAIR AND/OR REPLACE AS REQUIRED, CHECK EVAPORATIVE

29-02-9 Engine Diagnosis and Service 29-02-9 ROUTINE NO. 105 ENGINE CRANKS NORMALLY - STARTS HARD WHEN COLD VERIFY THE COMPLAINT USING PROPER STARTING PROCEDURE, INSPECT VACUUM SYSTEMS, ELECTRICAL SYSTEMS, FUELSYSTEMS, EVAPORATIVE CONTROL SYSTEM & AIR CLEANER FOR DAMAGE. LEAKS, BLOCKAGE & PROPER CONNECTIONS. NOTE: THE AIR CLEANER MAY BE REMOVED, IF NECESSARY, TO CONDUCT THE DESIGNATED INSPECTIONS, NOT+ OK OKt REPAIR AND/OR REPLACE AS REQUIRED.

29-02-10 Engine Diagnosis and Service 29-02.10 ROUTINE NO. 105 ENGINE CRANKS NORMALLY - STARTS HARD WHEN COLD - CONTINUrD OK CHECK THREE WAY CATALYST SVSTEM FOR PROPER OPERATION, SSD-24 IF SO EQUIPPED. REPAIR AND/OR REPLACE As REQUIRED.H P’PERFORM CYLINDER :OMPRESSIQN AND/OR L AGE TEST. I C NOT OK

29-02-11 Engine Diagnosis and Service 29-02-11 ROUTINE NO. 106 ENGINE CRANKS NORMALLY -STARTS HARD WHEN HOT VERIFY THE COMPLAINT USING PROPER STARTING PROCEDURES. INSPECT VACUUM SYSTEMS, ELECTRICAL SYSTEMS, FUEL SYSTEMS, EVAPORATIVE CONTROL SYSTEM AND AIR CLEANER FOR DAMAGE, LEAKS, BLOCKAGE AND PROPER CONNECTIONS. NOT OK OK

________ ____ _____ 29-02-12 Engine Diagnosis and Service 29-02-12 ROUTINE NO. 106 ENGINE CRANKS NORMALLY - STARTS HARD WHEN HOT - CONTINUED OK CHECK THREE’WAY CATALYST SYSTEM FOR PROPER OPERATION, SSD.24 IF SQ EQUIPPED. NOT OK OK r’A RAND/OR REPLACE AS REQUI RED, PERFORM CYLINDER COMPRESSION AND/OR

__________________ 29-02-13 Engine Diagnosis and Service 29-02-13 ROUTINE NO. 107 ENGINE IDLES ROUGH/MISSES WARM OR COLD ENGINE VERIFYTHECOMPLANT I OK INSPECT VACUUM SYSTEMS, ELECTRICALSYSTEMS, FUEL SYSTEMS, P EVAPORATIVE CONTROL SYSTEM, AIR CLEANER FOR DAMAGE, I LEAKS AND PROPER CONNECTIONS. 1OK NQTOK

________ ____ ______ 29-02-14 Engine Diagnosis and Service 29-02-14 ROUTINE NO. 107 ENGINE IDLES ROUGH/MISSES - CONTINUED WARM OR COLD ENGINE $ NOT$ OK O’I< REQUIRED. CHECK THREE WAY CATALVST SYSTEM FOR PROPER OPERATION, SSD’24 IIPSQ EQUIPPED. NOT OK

29-02-15 Engine Diagnosis and Service 29-02-15 ROUTINE NO. 107 - CONTINUED WARM OR COLD ENGINE ENGINE IDLES ROUGH/MISSES NOT OK OK REPAIR AND/OR REPLACE AS REQUIRED. SYSTEM CHECK, SSD’26, IF SO - I NOT OK OK REPAIR AND/OR REPLACE AS REQUIRED, PERFORM VALVE TRAIN ANALYSIS SSD’17,

29-02-16 Engine Diagnosis and Service 29-02-16 ROUTINE NO. 108 ENGINE IDLE SPEED VARIES VERIFY THE COMPLAINT I INSPECT VACUUM SYSTEMS, ELECTRICAL SYSTEMS, FUEL SYSTEMS, EVAPORATIVE CQNTRDLSYSTEM AND AIR CLEANER FOR DAMAGE, LEAKS, BLOCKAGE AND PROPER CONNECTIONS, NOT OK OK -.

_______ 29-02-17 Engine Diagnosis and Service 29-02-17 ROUTINE NO. 108 ENGINE IDLE SPEED VARIES - CONTINUED NQTO K OK POSITIVE CRANKCASE VENTILATION REPAIR ANQ/QR REPLACE AS REQUIRED. PERFORM SYSTEM SSD’I

29-02-18 Engine Diagnosis and Service 29-02-18 ROUTINE NO. 109 ENGINE MISSES AT HIGH SPEED VERIFY THE COMPLAINT INSPECT VACUUM HOSES, ELECTRICAL WIRING, FUEL SYSTEM, AIR CLEANER, DUCT, VALVE, FILTER ELEMENT, EVAPORATIVE SYSTEM FUR LEAKS, DAMAGE AND PROPER CONNECTIONS. NOT UK OK $ $ REP

29-02-19 engine Diagnosis and Service 29-02-19 ROUTINE NO. 109 ENGINE MISSES AT HIGH SPEED - CONTINUED OK$ CHECK ENGINE OPERATING TEMPERATURE FOR OVERHEATING, NOT+ OK OK$ PERFORM ROUTINE 125, CHECK THREE WAVCATALYSTSYSTEM FOR

_______ ___ _____ ________________________________ 29-02-20 Engine Diagnosis and Service 29-02-20 ROUTINE NO. 110 ENGINE MISSES AT LOW SPEEDS VERIFY THE COMPLAINT I I INSPECT VACUUM SYSTEMS, ELECTRICAL SYSTEMS, PUBL SYSTEMS. EVAPORATIVE CONTROL SYSTEM AND AIR CLEANER FOR DAMAGE, LEAKS. BLOCKAGE. AND PROPER CONNECTIONS NOT$ OK OK REPAIR ANO/OR

____ 29-02-21 Engine Diagnosis and Service 29-02-21 ROUTINE NO. 110 ENGINE MISSES AT LOW SPEEDS - CONTINUED OK PRPORM STEPS IS. IC 25,27529 OF REFERENCE TWO INTERNAL. NOT OK OK REPAIR AND/OR REPLACE AS REQUIRED, PERFORM CARBURETOR SSD-13- IDLE FUEL MIXTURE - ADJUST. NOT OK

___ 29-02-22 Engine Diagnosis and Service 29-02-22 ROUTINE NO. 111 ENGINE STALLS AT IDLE - ENGINE COLD VERIFYTHEGOMPLAINT I I INSPECT VACUUM SYSTEMS, ELECTRICAL SYSTEMS, FUEL SYSTEMS, EVAPORATIVE CONTROL SYSTEM AND AIR CLEANER FOR DAMAGE, LEAKS, AND PROPER CONNECTIONS. NOT OK OK

29-02-23 Engine Diagnosis and Service 29-02-23 ROUTINE NO. 111 ENGINE STALLS AT IDLE - ENGINE COLD - CONTINUED OK PERFORM POSITIVE CRANKCASE VENTILATION SYSTEM S5D’lI PART I, CHECK PCV SYSTEM FUNCTION A, B. C. 0. I NOTOK - OK REPAIR AND/OR REP

29-02-24 Engine Diagnosis and Service 29-02-24 ROUTINE NO.111 ENGINE STALLS AT IDLE - ENGINE COLD - CONTINUED OK 4 PERFORM EEC SYSTEM CHECK, SSD-25, NO10K OK REPAIR AND/OR REPLACE AS REQUIRED. PERFORM CYLINDER COMPRESSION AND/OR

29-02-25 Engine Diagnosis and Service 29-02-25 ROUTINE NO. 112 ENGINE STALLS AT IDLE ENGINE HOT VERIFY THE COMPLAINT OK t RRNONEECVEHICLESMOMENTARILY INCREASE ENGINE SPEED TO 250G RPM /3000 RPM FOR 2 BLI. OBSERVE EGR VALVE STEM MOVEM

29-02-26 Engine Diagnosis and Service 29-02-26 ROUTINE NO. 112 ENGINE STALLS AT IDLE - ENGINE HOT - CONTINUED OK PERFORM POSITIVE CRANKCASE VENTILATION SYSTEM SSO’!l PART I,CHECK PCVSYSTEM FUNCTION PARTS A; B, C, 0, $ NOT+ OK OK

__ ______________________ ____________________ 29-02-27 Engine Diagnosis and Service 29-02-27 ROUTINE NO. 113 ENGINE STALLS DURING DECELERATION OR ON QUICK STOP VERIFYTHECOMPLAINT I INSFECT VACUUM SYSTEMS, ELECTRICAL SYSTEMS, FUEL SYSTEMS, EVAPORATIVE CONTROLSYSTEMS, AIR CLEANER FOR DAMAGE, LEAKS AND PROPER CONNECTIONS. NOT+ OK OK REPAIR AND/OR REPLACE AS REQUIRED, RFM ENCE 4,

29-02-28 Engine Diagnosis and Service 29-02-28 ROUTINE NO, 113 ENGINE STALLS DURING DECELERATION OR ON QUICK STOP - CONTINUED OK PERFORM EEC SYSTEM CHECK: SSD’25, f NOT OK dK $ REPAIR AND/OR REPLACE AS REQUIRED. PERFORM CARBURETOR IOEL FUEL MIXTU

_ _____ 29-02-29 Engine Diagnosis and Service 29-02-29 ROUTINE NO. 114 ENGINE HESITATES/STALLS DURING ACCELERATION VERIFY THE COMPLAINT INSPECT VACUUM SYSTEMS, ELECTRICAL SYSTEMS, FUEL SYSTEMS, EVAPORATIVE CONTROL SYSTEM, AIR CLEANER FOR DAMAGE, LEAKS AND PROPER CONNECTIONS. NOT OK R EPA IRAND/OR RE PLACE AS REQII IREO I4 CE TVIO T Eps 11.6, 7 9, 10, 4, NOT OK OK

29-02-30 Engine Diagnosis and Service 29-02-30 ROUTINE NO, 114 ENGINE HESITATES/STALLS DURING ACCELERATION - CONTINUED OK PERFORM AIR CLEANER TEMPERATURE CONTROL SYSTEM SSD’9. NOT OK DK + + REPAIR AND/OR REPLACE As REQUIRED. CHECK

29-02-31 Engine Diagnosis and Service 29-02-31 ROUTINE NO. 115 ENGINE HAS POOR ACCELERATION VERIFY THE COMPLAINT I ‘I, INSPECT VACUUM SYSTEM. ELECTRICAL SYSTEM, FUEL SYSTEM. [

_________ 29-02-32 Engine Diagnosis and Service 29-02-32 ROUTINE NO. 115 ENGINE HAS POOR ACCELERATION - CONTINUED -tNOT D K OK $ IF STEP 2015 NOT OK, PERFORM STEPS 21 & 22 o REFERENCE TWO AND REPAIR AND/DR REPLACE 1 CHECK THREE WAY CATALYST SYSTEM FOR ASREOUIRED, I - PROPER OPERATION, SSD.24 IF SO EOUIPPEDI,

29-02-33 Engine Diagnosis and Service 29-02-33 ROUTINE NO. 116 ENGINE HAS LESS THAN NORMAL POWER VERIFY THE COMPLAINT INSPECT VACUUM SYSTEMS, ELECTRICAL SYSTEMS. FUEL SYSTEMS, EVAPORATIVE CONTROL SYSTEM AND AIR CLEANER FOR DAMAGE, LEAKS AND PROPER CONNECTIONS. NOT4 OK OK$ REPAIR AND/OR REPLACE AS REOUIRED.H CHECK AUTOMATIC TRANSMISSION FLUID LEVEL. I

_____ 29-0234 Engine Diagnosis and Service 29-02-34 ROUTINE NO. 116 ENGINE HAS LESS THAN NORMAL POWER - CONTINUED NOT+ OK dK4 PERFORM SSD-11 STEPS 1D, AND CHECK AIR CLEANER PER SSD-9, REPAIR AND/OR REPLACE AS REQUIRED. I NOT OK OK 4

29-02-35 Engine Diagnosis and Service 29-02-35 ROUTINE NO. 116 ENGINE HAS LESS THAN NORMAL POWER-CONTINUED OK4 PERFORM CYLINDER COMPRESSION AND/OR LEAKAGE TEST. NOT OK OK t $ REPAIR AND/OR REPLACE AS REQUIRED.

29-02-36 Engine Diagnosis and Service 29-02-36 ROUTINE NO. 117 EXHAUST SYSTEM BACKFIRE VERIFY THE COMPLAINT L__. k INSPECT VACUUM SYSTEMS AND IGNITION WIRING FOR LEAKS AND/OR PROPER ROUTING. NOT+ OK OK$ REPAIR AND/OR REPLACE AS REOUIRED. PERFORM STEPS 10,11, 12 AND 13 OP

29-02-37 Engine Diagnosis and Service 29-02-37 ROUTINE NO. 118 ENGINE SURGES VERIFY THE COMPLAINT INSPECT VACUUM SYSTEMS. ELECTRCALSYSTEMS, FUEL SYSTEM, EVAPORATIVE CONTROL SYSTEM, AND AIR CLEANER FOR DAMAGE, BLOCKAGES. LEAKS. AND PROPER CONNECTIONS. NOT OK OK REPAIR AND/OR REPLACE AS REQUIRED. PERFORM COMPRESSION EALANCE IELECTRICAL STE

_________________________________________ 29-02-38 Engine Diagnosis and Service 29-02-38 ROUTINE NO. 118 ENGINE SURGES - CONTINUED -- RM STEP 2D OF REFERENCE TWO. NOOK PERFORM STEPS 21 & 22 OF REFERENCE TWO AND 1FORM SSD’13, IDLE FUEL MIXTURE -ADJUST. REPAIR AND/OR REPLACE AS REQUIRED. I NOT OK OK REPAIR AND/OR REPLACE AS REQUIRED, PERFORM SSD’9,AIR CLEANER TEMPERATURE

29-02-39 Engine Diagnosis and Service 29-02-39 ROUTINE NO, 119 EXCESSIVE FUEL CONSUMPTION VERIFY THE COMPLAINT INSPECT VACUUM SYSTEMS. ELECTRICAL SYSTEMS, FUEL SYSTEMS, EVAPORATIVE CONTROL SYSTEM AND AIR CLEANER FOR DAMAGE, LEAKS, AND PROPER CONNECTIONS. NOT OK OK + t REPAIR AN

29-02-40 Engine Diagnosis and Service 29-02-40 ROUTINE NO. 119 EXCESSIVE FUEL CONSUMPTION - CONTINUED OK .4 PERFORM EGR SYSTEM CHECK.SSD I- I NOT OK OK $ RAND/ORREACUIRED.

29-02-41 Engine Diagnosis and Service 29-02-41 ROUTINE NO. 119 EXCESSIVE FUEL CONSUMPTION - CONTINUED OK - CHECK FOR CLUTCH SLIPPAGE IM/TI, OR IMPROPER TRANSMISSION OPERATION AND FLUID LEVEL IA/TI. -________

29-02-42 Engine Diagnosis and Service 29-02-42 ROUTINE NO. 120 EXCESSIVE OIL CONSUMPTION VERIFYTHECOMPLAINT THE MOST COMMON CAUSE OF OIL LOSS IS LEAKAGE. TO VERIFY AN EXCESSIVE OIL CONSUMPTION COMPLAINt IT IS NECESSARY THAT A THOROUGH INSPECTION BE MADE TO INSURE THAT LEAKAGE DOES NOT EXIST, THE FOLLOWING STEPS SHOULD BE FOLLOWEO TO RESOLVE AN EXCESSIVE OIL CONSUMPTION COMPLAINT: A. STEAM CLEAN THE ENGINE IF NECESSARYI TO REMOVE ACCUMULATED DIRT AND/OR OIL. B. DRAIN ENGINE OIL AND CHANGE THE OIL FILTER. C,

_________________________________ _________________________________ 29-02-43 Engine Diagnosis and Service 29-02-43 ROUTINE NO, 120 EXCESSIVE OIL CONSUMPTION - CONTINUED NOTE: A NEW ENGINE MAY REQUIRE UP TO 6,DOO MILES OF OPERATION IN ORDER TO PROPERLY SEAT BREAK NI THE PISTON RINGS, FOR THIS REASON, THE ENGINE SHOULO NOT BE CONDEMNED AS LONG AS OIL ECONOMY IS IMFROVING WITH MILEAGE ACCUMULATION, IF OIL ECONOMY CEASES TO IMPROVE WITH MILEAGE ACCUMULATION. CORRECTIVE ACTION SHOULD BE TAKEN. CHECK SPARK PLUGS FOR OIl, OR CARBON

_ _ 29-02-44 Engine Diagnosis and Service 29-02-44 ROUTINE NO. 121 ENGINE DIESELS - CONTINUES TO RUN AFTER SHUT OFF VERIFY THE COMPLAINT T’7NSPECT VACUUM SYSTEMS, ELECTRICAL SYSTEMS, FUEL SYSTEMS. EVAPORATIVE CONTROL SYSTEM, AND AIR CLEANER FOR DAMAGE. BLOCKAGES, LEAKS. AND IMPROPER CONNECTIONS CHECK TO INSURE THAT PROPER GRADE OP FUEL IS BEING USED. PERFORM STEPS OF j,,,,,REFERENCE TWO.

29-02-45 Engine Diagnosis and Service 29-02-45 ROUTINE NO. 121 ENGINE DIESELS - CONTINUES TO RUN AFTER SHUT OFF - CONTINUED NOT OK OK PERFORM ROUTINE 125, PERFORM EGR SYSTEM CHECK, 5SD’l, L fl NOT OK OK t REPAIR AND/OR REPLACE AS REQUIRED. PERFORM STEPS 18.19,24,27 & IS,

29.02-46 Engine Diagnosis and Service 29-02-46 ROUTINE NO. 122 ENGINE NOISE NOISY ENGINE OPERATION COVERS A WIDE RANGE OF COMPLAINTS; THEREFORE, TO MAKE THE MOST EFFICIENT USE OF DIAGNOSTIC AIDS TO RESOLVE THE COMPLAINT, AN ACCURATE VERIFICATION OF THE SYMPTOMS MUST BE MADE WHEN THE SVMPTOM IS IDENTIFIED AS TO THE TYPE AND GENERAL LOCATION OF THE NOISE, PROCEED TO THE APPLICABLE STEP OUTLINED BELOW, ITWILL BE SEEN THAT MANY OF THE STEPS ARE BASED ON SIMILAR SYMPTOMS AND. INDEED MAV BE A MATTER OF INDIVIDUAL INTERPRETATION. THEREFORE, IF THE MOST LIKELY STEP FAILS TO RESOLVE THE COMPL

29-0247 Engine Diagnosis and Service 29-02-47 ROUTINE NO. 122 ENGINE NOISE - CONTINUED I. RINGING. GRINDING OR COMBINATION OF BOTH CHECK FOR LOOSE, BENT OR IMPROPER PULLEYS, CHECK FOR FRONT END BRACKET INTERFERENCE BETWEEN ROTATING PARTS AND SURROUNDING COMPONENTS CAUSED BY MISALIGNMENT OF ENGINE, ENGINE COMPONENTS, OR SURROUNDING COMPONENTS, CHECK FOR WORN OR DAMAGED WATER PUMP OR ACCESSORY COMPONENTS DY LOOSENING DRIVE BELTS ONE AT A TIME UNTIL NOISE STOPS. J. BUZZING OR M4ISTLING DU

29-02-48 Engine Diagnosis and Service 29-02-48 ROUTINE NO. 122A SPARK KNOCK OR PINGING VERIFY THE COMPLAINT CHECK WITH OWNER ASTO GRADE OF FUEL L BEING USED. NOT OK OKt ADVISE OWNER OF PROPER GRADE OF FUEL. CHECK ENGINE FOR OVERHEATING, I NOT OK

29-02-49 Engine Diagnosis and Service 29-02-49 ROUTINE NO. 122A SPARK KNOCK OR PINGING - CONTINUED NOT OK OK t fl PERFORM STEP 23 OF REFERENCE TWO PERFORM SSD-9, "AIR CLEANER TEMPERATURE IF APPLICASLEI AND REPAIR AND/OR CONTROL:’ REPLACE AS REQUIRED NOT OK OK t REPAIR AND/OR REPLACE ASS REQUIRED. PERFORM STEPS 10.13

29-02-50 Engine Diagnosis and Service 29-02-50 ROUTINE NO. 122A SPARK KNOCK OR PINGING - CONTINUED NOT OK OK REPAIR AND/DR REPLACE AS REQUIRED. DUPLICATE THE COMPLAINT BY LOADING THE EN. GINE AGAINST THE TORQUE CONVERTER AND E. VALUATING THE PERFORMANCE USING A ROTIJN. DA ENGINE SYSTEM ANALYZER OR EQUIVALENT,

____________________________________ ______________ 29-02-51 Engine Diagnosis and Service 29-02-51 ROUTINE NO. 123 ENGINE VIBRATION VERIFY THE COMPLAINT I ‘I________________________________ INTEGRITY OF MOTOR MOUNTS, VIBRATION DAMPER AND FAN. NOT OK OK + REPAIR AND/OR REPLACE AS REQUIRED. CYCLE ENGINE ACCESSORY COMPONENT

29-02-52 Engine Diagnosis and Service 29-02-52 ROUTINE NO. 124 ENGINE FAILS TO REACH NORMAL OPERATING TEMPERATURE VERIFY THE COMPLAINT BY THE USE OF A THERMOMETER. NOT OK OK t REPLACE THERMOSTAT, CHECK OPERATION OF TEMPERATURE SENDING UNIT, GAUGE OR LIGHT. NOT OK +

_______ 29-02-53 Engine Diagnosis and Service 29-02-53 ROUTINE NO. 125 LOSS OF COOLANT OR ENGINE OVERHEATING VERIFYTHECOMPLAINT I CHECK COOLANT LEVEL AND CONDITION, REPLACE REQUIRED COOLANT AND CLEAN REDIATOR CAP SEAL AND SEAT. LOSS OF COOLANT ENGINE OVEAHEATSI ["ECK FOR OBVIOUS EXTERNAL LEAKS,

29-02-54 Engine Diagnosis and Service 29-02-54 ROUTINE NO. 125 LOSS OF COOLANT OR ENGINE OVERHEATING-CONTINUED NOT OK REPAIR AND/OR REPLACE COOLING PVS TEMPERATURE SENDING UNIT AND/OR WARNING I LIGHT, AS REQUIRED, J NOT OK OK t PERFORM SSD.3 & REPAIR AND/OR REPLACE AS CHECK FOR RESTRICTED EXHAUST, REQUIRED, NOT OK O

_____________________________________ 29-02-55 Engine Diagnosis and Service 29-02-55 ROUTINE NO. 126 SMOKE FROM VEHICLE EXHAUST SYSTEM VERIFY THE COMPLAINT I INSPECT FUEL SYSTEM, EVAPORATIVE CONTROL SYSTEM, AND AIR CLEANER FOR DAMAGE. LEAKS, BLOCKAGE, AND PROPER CONNECTIONS. INSPECT SPARK PLUGS FOR EXCESSIVE OIL OR DEPOSIT BUItD’UP WHICH COULD ArFECTPERFORMANCE. T

29-02-56 Engine Diagnosis and Service 29-02-56 ROUTINE NO. 126 SMOKE FROM VEHICLE EXHAUST SYSTEM - CONTINUED OK PERFORM EGR SYSTEM CHECK, SSD-t NOT OK $ OKt REPAIR AND/OR REPLACE AS REQUIRED. PERFORM STEP C OF SSD4 INON.CATALYSTI DR STEPS C II THRU IXI OF SSD-5 ICATALYTIC

29-02-57 Engine Diagnosis and Service 29-02-57 ELECTRICAL SYSTEMS DIAGNOSIS REFERENCE ONE 1. Check battery Using Rotunda tester or equivalent. 2. Check starter draw. 3. Check battery voltage during Cranking. 4. Check cranking speed. 5. Check basic timing while cranking. 6. Check spark plug firing voltage while cranking. 7. Check low idle speed with and Without TSP SSD-26. NOTE: When idle speed is adjusted, also perform Fuel Bowl Vent Procedure SSID16 Except Model 4350.

29-02-58 Engine Diagnosis and Service 29-02-58 REFERENCE TWO CARBURETOR AND FUEL SYSTEM DIAGNOSIS TO DETERMINE THE cAuSE OF A FUEL SYSTEM COMPLAINT. USE THE APPROPRIATE COMBINATION OF THE FOLLOWING DIAGNOSIS STEPS AS OUTLINED IN THE PROBLEM DIAGNOSTIc PROCEDURES- ALL DISCREPANCIES SHOULD DE REPAIRED. ADJUSTED. CLEANED AND/OR REPLACED AS REQUIREO. IDLE MIXTURE SHOULD BE VERIFIED AND/OR ADJUSTED AFTER CAnBURET0R INTERNAL REPAIRS. 1. CHECK FUEL SUPPLY IN FUEL TANK A. CHECK FOR FUELAVAILABILITY B. CHECK FOR FUEL CONTAMINA

29-02-59 Engine Diagnosis and Service 29-02-59 8, CHECK ENGINE SPEED ADJUSTMENTS NOTE: ALL ENGINE SPEED ADJUSTMENTS AND CHECKSSHOULD BE PERFORMED AFTER ENGINE HAS BEEN PROPERLY WARMED AND AFTER VACUUM, IGNITION, FUEL, AND/DR MECHANICAL COMPLAINTS HAVE BEEN PROPERLY RESOLVED THEN FINAL ADJUSTMENTS SHOULD BE MADE ACCORDING TO SPECIF/CATION. A, CHECK CURB IDLE SPEED, ADJUST AS NECESSARY PER SSD’26. B. CIILCK LOW IDLE SPEED WITHOUT TSP, NOTE WHEN IDLE SPEED IS ADJUSTED, ALSO PERFORM FuEL BOWL VENT PROCEDURE SSD’16 IEXCEPTMODEL43SOI.

29-02-60 Engine Diagnosis and Service 29-02-60 16. CHECK FUEL ENRICNMENT SYSTEM A- CHECK FOR AIR LEAK B- CHECK FOR FUEL LEAK C. CHECK FOfl RESTRICTIONS 0. CHECK FOP DAMAGED PARTS E, CHECK FOR PROPER ASSEMBLY F- CHECK FOR CONTAMINATION G, CHECK FOR PROPER ALIGNMENT OF VENTURI VALVE LIMITER MODEL 27001- REMOVE UPPER BODY. H, CHECK FOR PROPER ADJUSTMENT OF VENTURI VALVE LIM

29-02-61 Engine Diagnosis and Service 29-02-61 L, CHECK CHOKE METERING ROD INDEX MODEL 2700 ONLV’PER CHOKE SET PROCEDURE, STEPS’ 5 M. CHECK FAST IDLE CAM SETTING IMOOEL 2700 ONLY.PER CAM SET PROCEDURE. STEPS 1‘5 N, CHECK HIGH CAM FINGER SETTING MODEL 2700 ONLY’PER HIGH CAM FINGER SETTING PROCEDURE 0, CHECK FOR CHOKE METERING ROD SEATING IMOPEL 2700 ONL’y"FULLY DEPRESS CHOKE METERING ROD AND CHECK FOR STICKING OR BINDING 23. CHECK HOT IDLE COMPENSATOR A. CHECK FOR DAMAGED PARTS

29-02-62 Engine Diagnosis and Service 29-02-62 DIAGNOSIS PROCEDURES SSD’s NOTE: For specifications not contained in the vehicle being serviced. In addition, always consult following procedures, refer to Shop Manual Parts the latest bulletins and other service information for the individual components or systems being for changes in procedures and/or latest diagnosed or serviced, or refer to the appropriate specifications. Service or Performance Specifications Book for the P.. EMISSION CONTROL SYSTEM DIAGNOSIS AND SERVICE PROCEDURES SERVICE/DIAGNOSIS PROCEDURE PAGE SSO-1 EGR System

29-02-63 Engine Diagnosis and Service 29-02-63 4. With the engine at idle, apply vacuum to the 2. Disconnect EGR vacuum hose at EGR valve and EGR valve of at least Bin. Hg. The valve should connect a vacuum gauge to the hose. mave to the full extent of its travel and engine 3. Start engine and warm it up until engine should roughen, RPM should decrease and/or coolant temperature is above the calibration stop completely. If idle quality doesn’t change temperature of the EGR PVS as previously there is no EGR flow and if the specifications indicated. of Step 3 have been met something is plugging

29-02-64 Engine Diagnosis and Service 29-02-64 c. Direct the blaster stream against the valve D. EGR Supply tube and spacers poppet until the poppet appears free of 1. Remove the carburetor and carburetor spacer deposits. Remove debris with shop air. except on engines where the valve is not CAUTION: Do not direct blaster stream mounted on the spacer. against the valve diaphragm, 2. Clean supply tube with a small power driven d. Clean orifice plate and counterbore in valve rotary type wire brush or blast cleaning body. Reinstall orifice by using a small equipment. amount of contact cement to retain plate

29-02-65 Engine Diagnosis and Service 29-02-65 Remove vacuum and using a felt tip pencil, and the engine shows very little roughness and mark stem position closest to the valve main variation in speed during this test sequence- body. Re-install valve and related components the EGR system is functioning properly. on engine using new gaskets. Discontinue diagnostic procedure. V. Backpressure EGA Diagnostic Procedure b. If the EOR valve does not appear to operate Remote EGR Valve and Transducer properly; i.e., valve appears to move near full

29-02.66 Engine Diagnosis and Service 29.02.66 F.2. If the EGR valve, spacer and transducer have supply tube, improper EGR valve seating can deposits, clean FOR valve and spacer per SSD-1, be determined by evaluation without FOR Part IV. Also clean backpressure pick-up in gas flow: control chambers with small wire brush or scraper. 1 Remove the EGR gas supply tube. Apply CAUTION: Do not use liquid solvents or appropriate plugs at both exhaust and compressed air on transducer. intake fittings. Plugs at the FOR intake F.3. If any repairs were made in Step F, verify fitting must be air tight. backpressure functioning accord

29-02-67 Engine Diagnosis and Service 29-02-67 2. Using an ohmmeter, measure the following should be observed coming from the open end resistances on the EGR valve connector see Fig. of the FOR cooler outlet tube. If gasses are not 35. observed, inspect FOR passages per 550-1, a. Pin A to pin C should be 3000 to 5000 ohms. Step F 3. If gasses are observed, inspect FOR b. Pin B to pin C should be 400 to 825 ohms. spacer per SSO-1, Step 0. After completion of 3. If both resistance readings are OK, proceed to this procedure, reinstall FOR valve and repeat Step VII-B.

29-02-68 Engine Diagnosis and Service 29-02-68 proper connection-refer to emissions If the gage signal does not drop to less than calibrations publications. 2.0 in. Hg, replace the load control valve. If C. Warm up engine to normal operating the gage signal drops to less than 2.0 in. of temperature and connect tachometer. Kg and does not return to greater than 4.0 0. While slowly opening and closing the throttle, the in. of Hg when the external source vacuum FOR valve stem must move upward and/or is removed from the venturi part, replace the oscillate and move downward to the closed

29-02-69 Engine Diagnosis and Service 29-02-69 d Apply vacuum and observe time in seconds for c Connect a 24 inch section of vacuum hose to the gauge to read from 0" to 8" while applying a gage and to the other side of the vacuun vent a constant 10" Hg vacuum. valve. 2. The minimum and maximum time for the valve to d Apply vacuum and observe time in seconds for reach 8" Hg should be as follows: the gage to read from 0 inches Hg to 8 inches Hg while applying a constant 10 inches Hg vacuum.

29-02-70 Engine Diagnosis and Service 29-02-70 Install a connector in place of SDV for system 1 2. For vehicles with a Cooling PVS check vacuum checks. reading at distributor at normal idle. If vacuum 2 Install "1" fitting and vacuum gauge in primary reading is 2 in. Hg or less the Cooling PVS is OK. side of distributor. If vacuum reading is greater than 2 in. Hg remove 3 With engine at normal operating temperature the top vacuum line the line that goes to the and transmission in neutral, momentarily open carburetor at Cooling PYS and plug. If vac

29-02-71 Engine Diagnosis and Service 29-02-71 8. Reinstall check valve in hose to distributor. c Apply vacuum to opposite side used in 1. 9. Install connector and vacuum gauge in vacuum Reading on gauge should be same as source. hose from PVS to check valve. If it is not, replace the valve. 10. With engine running at normal operating temperature and transmission in neutral, SSD-4-THERMACTOR NON-CATALYTIC momentarily open throttle 1/2 open. CONVERTER EMISSION SYSTEM CHECK 11. Observe the vacuum gauge for evidence of vacuum. If vacuum reading is two inches Hg or The thermactor non-catalyst system consists of the less, PVS is OK. If vac

29-02-72 Engine Diagnosis and Service 29-02-72 manufacturer. Compare the belt tension to the be 2.25 2 1/4 psi minimum. If the air pressure specified belt tension and adlust as necessary. is not within specification, replace the valve. 2. If adjustment is necessary, loosen the air pump 6. Turn off the engine, remove all test equipment mounting and adjusting arm bolts. Move the air and connect the air supply hoses to the air pump toward or away from the engine until the bypass valvels, and tighten all clamps. correct tension is obtained. Use air pump belt tensioning tool Tool T75L-9480-A or equivalent Determine if the ai

29-02-73 Engine Diagnosis and Service 29-02-73 check valve and test bulb. Position and tighten as required. Position and tighten to specification to specification a hose clamp at each end of the a hose clamp at each end of the hose. hose. Repeat Step 5 above. E. Thermactor System Noise Test 1 2. Remove the hose from the check valve. Install the NOTE: The thermactor system is not completely new check valve ott the engine and torque to noiseless. Under normal conditions, noise rises in specification. Visually inspect the original hose pitch as engine speed increases. To determine if for any surface condition that would cause

29-02-74 Engine Diagnosis and Service 29-02-74 4. With the transmission in neutral or park and the TIMED AIR-BypAss VALVE parking brake on, warm the engine to normal operating temperature. 5. Stop the engine and disconnect the air supply hoses from the air pump to the air bypass valve at the air bypass valve.

29-02-75 Engine Diagnosis and Service 29-02-75 2. Stop the engine and remove the air bypass valve silencer cover. The air flow interruption during to air manifold check valve hoses at the bypass deceleration cannot be specified due to valve. For a tee system, remove both hoses variations in the rate of deceleration and connecting the bypass valve to the check valves. manifold vacuum. Install a tachometer on the engine. 4. If the bypass vave meets test requkenents, but 3. With the transmission in neutral or park and the does not function as described in Step 3, check parking brake on, start the engine

29-02-76 Engine Diagnosis and Service 29-02-76 4a. While the engine is at idle condition, ground CVI. Vacuum Delay Valve Check only required on the other exposed terminal en the solenoid vehicles equipped with a delay valve in the vacuum valve to chassis ground. Thermactor air bypass valve vacuum line should not dump to atmosphere. Delay Valve Functional Test 4b. Connect wire removed in Step 3a to solenoid vacuum valve. Thermoctor air should not be Equipment Required: dumped to atmosphere. a Vacuum gauge-.USG Model 12121-I, 2" dia. 5. Replace solenoid vacuum valve if statement 4a 0-30" Hg vacuum gauge or equivalent

29-02-77 Engine Diagnosis and Service 29-02-77 B. Install a vacuum hose on the small nipple on the ports in the valve silencer cover. If this cycle does TIV valve and connect it to one leg of a 3-way not occur, the valve must be replaced. "tee". 5. Stop the engine and remove the cap from the C. Connect the second leg of the "tee" to a vacuum vacuum vent nipple, and leave nipple open. gage and connect the third leg of the "tee" to 6. With the transmission in neutral or park and the the connector on the bypass valve. parking brake on, start the engine. Accelerate the D. Connect a vacuum gage to the i

29-02-78 Engine Diagnosis and Service 29-02-78 If the first gage signal does not drop to less CXIV Vacuum Reservoir Check than 2.0 in. Hg, replace the load control valve. 1. Disconnect vacuum hoses from both ends of the If the gage signal drops to less than 2.0 in. Hg vacuum reservoir. and does not return to greater than 4.0 in. Hg 2. Plug one end with vacuum cap. when the external source vacuum is removed 3. Connect Tool 21-0014 with a small hose to from the venturi port, replace the vacuum load open end of the reservoir and apply vacu

29-02-79 Engine Diagnosis and Service 29-02-79 check valve and test bulb. Position and tighten SSD-9----AIR CLEANER TEMPERATURE to specification a hose clamp at each end of the CONTROL hose. Repeat Step 5. VACUUM OPERATED SYSTEMS CHECK 12. Remove the hose from the check valve. Install the new check valve on the engine and torque to NOTE: On vehicles equipped with an air cleaner retard specification. Visually inspect the original hose delay valve, check the valve according to SSD-2. for any surface condition that would cause a On vehicles equipped with a cold weather problem in the near future. Replace with a new

29-02-80 Engine Diagnosis and Service 29-02-80 2. Remove the air cleaner cover and element. nuts and run engine until the specified Inspect heat riser tube and zip tube for proper temperature is reached. If the duct door has not installation and/or damage. Repair or replace as started to open by then, replace the sensor. required. 9. Turn off the engine. Remove all test instruments 3. Remove items necessary to see the duct door. and check to insure that no extraneous dirt or 4. Remove the vacuum line at the duct and valve. sand is on the air cleaner tray or

29-02-81 Engine Diagnosis and Service 29-02-81 When the switch is cooled below 40°F, the 13. Temperature Vacuum System Valve only on internal switch contacts should be open. The applicable models ohmmeter should read maximum resistance and a. TVS Valve-normally opened type white the test light should not light. 1. Cool the TVS valve to 40°F or less. The valve If the switch does not open below 40°F, the can be cooled by spraying with liquid R-12 switch should be replaced. refrigerant and a 23-0009 can adapter or d. Increase the switch temperature until the equivalent. Allow sufficie

29-02-82 Engine Diagnosis and Service 29-02-82 D. Using an external vacuum source, apply a PCV valve and clean the PCV system per Step minimum of 16" Hg vacuum and trap. The II. vacuum motor should remain closed for 60 II. Clean PCV System: seconds. If not, replace the duct and valve 1. Remove the PCV System components, filler cap, assembly. PCV valve, hoses, tubes, fittings, etc. from the SSD-1 1-PCV SYSTEM engine. ALL VEHICLES-ALL ENGINES 2. Clean the rubber ventilation hoses by passing

29-02-83 Engine Diagnosis and Service 29-02-83 4. If necessary, restart the engine and warm to -After making the cam adlustment, allow the normal operating temperature. choke plate to close. Check the choke plate to 5. Place test light in series with choke terminal and be sure it closes tightly in the air horn. stator lead. if light dQes not glow, replace choke 8. This completes the pulldown check. Next, install cap assembly. If light glows, turn-off engine. new choke cap gasket and reset the choke Remove light. bimetal cap to previously recorded recommended 6. Manually open throttle and set on fast idle cam. ind

29-02-84 Engine Diagnosis and Service 29-02-84 4. If further cleaning is required, remove altitude 7. This value should be within specification. If range compensator assembly from the carburetor is exceeded, repiace choke cap and repeat ill removing four machine screws and clean with beginning with Step 4. iead-free fuel, or equivalent. If unable to free-up 8. Recool choke housing until choke plate just the valve, replac. the altitude compensator closes. If choke plate is closed, this step should assembly. not be performed. 5. if required, reinstall the aneroid housing and 9. Remove choke tester 14-0206 or e

29-02-85 Engine Diagnosis and Service 29-02-85 3. Exert a light pressure on the choke piston lever 4. If the choke plate clearance and fast idle cam to hold the gauge in place, then use a drili with linkage adjustment was performed with the a diameter equal to the specified pulldown carburetor on the engine, adjust the engine idle clearance between the lower edge of the choke speed. Adjust the dashpot if so equipped. plate and the carburetor bore to check clearance. VI. Fast idle Cam index Setting 4. To adjust the choke plate pulldown clearance, 1. Position the fast idle screw on the kickdown step bend the choke piston lever as required to obtain of the fast idle cam

29-02-86 Engine Diagnosis and Service 29-02-86 plates choke plates will not close completely and 2. Warm engine to normal operating temperature observe that the fast idle adjusting screw is and observe flow meter reading. seated on the kickdown step of the fast idle cam. 3. If flow meter reading is within specification, If this condition is met, proceed quickly to Section remove the flow meter, reconnect the clean air ill. if this condition is not met, repair or replace hose to the carburetor and proceed to Section III. fast idle cam latch assembly, following Caution 4. If the flow meter reading is not within No. 2 as outlined in Section II, Step No. 2. Th

29-02-87 Engine Diagnosis and Service 29-02-87 2. Open throttle about half-throttle and position the SSD-12 AUTOMATIC CHOKE CHECK fast idle adjusting screw on the high step of the PROCEDURE fast idle cam. Model 2700 Carburetor 3. Rend a 0.036" diameter wire gouge at a 90 I. Freedom of Linkage and System integrity Check degree angle approximately 1/8" from its end. With the Engine Off, Perform the Following Insert the bent end of the gauge between the

29-02-88 Engine Diagnosis and Service 29-02-88 VENTURI VALVES CONTROL VACUUM REGULATOR HIGH CAM LEVER DIAPHRAGM CAM ADJUSTINU SCREW COLD ENRICHMENT ROD HIGH CAM LEVER