1A-10 Engine General Information and Diagnosis:
Engine stalls often
(Incorrect fuel/air mixture)
Defective IAP sensor or circuit. Repair or replace.
Clogged fuel filter. Clean or replace.
Defective fuel pump. Replace.
Defective fuel pressure regulator. Replace.
Defective ECT sensor. Replace.
Defective thermostat. Replace.
Defective IAT sensors. Replace.
Damaged or cracked vacuum hose. Replace.
Damaged or cogged ISC valve. Replace or repair.
Engine stalls often (Fuel
injector improperly
operating)
Defective fuel injector. Replace.
No injection signal from ECM. Repair or replace.
Open or short circuited wiring
connection.
Repair or replace.
Defective battery or low battery voltage. Replace or recharge.
Engine stalls often
(Control circuit or sensor
improperly operating)
Defective ECM. Replace.
Defective fuel pressure regulator. Replace.
Defective TP sensor. Replace.
Defective IAT sensors. Replace.
Defective CMP sensors. Replace.
Defective CKP sensor. Replace.
Defective ECT sensor. Replace.
Defective fuel pump relay. Replace.
Defective ISC valve. Replace.
ISC inconnect learning. Reset learned value.
Engine stalls often
(Engine internal parts
improperly operating)
Fouled spark plug. Clean.
Defective CKP sensor or ECM. Replace.
Clogged fuel hose. Clean.
Out of valve clearance adjustment. Adjust.
Noisy engine (Excessive
valve chatter)
Too large valve clearance. Adjust.
Weakened or broken valve spring. Replace.
Worn tappet or cam surface. Replace.
Worn or burnt camshaft journal. Replace.
Noisy engine (Noise
seems to come from
piston)
Worn down piston or cylinder. Replace.
Combustion chamber fouled with
carbon.
Clean.
Worn piston pin or piston pin bore. Replace.
Worn piston ring or ring groove. Replace.
Noisy engine (Noise
seems to come from cam
chain)
Stretched cam chain. Replace.
Worn sprocket. Replace.
Cam chain tension adjuster not working. Repair or replace.
Noisy engine (Noise
seems to come from
clutch)
Worn splines of countershaft or hub. Replace.
Worn teeth of clutch plate. Replace.
Distorted clutch plate. Replace.
Worn clutch release bearing. Replace.
Weakened clutch damper. Replace the primary driven gear.
Worn clutch lifter related parts. Replace related parts as a set.
Noisy engine (Noise
seems to come from
crankshaft)
Rattling bearing due to wear. Replace.
Worn or burnt big-end bearing.
Replace.
Worn
or burnt journal bearing. Replace.
Too large thrust clearance. Replace thrust bearing.
Noisy engine (Noise
seems to come from
transmission)
Worn or rubbing gear. Replace.
Worn spline. Replace.
Worn or rubbing primary gear. Replace.
Worn bearing. Replace.
Noisy engine (Noise
seems to come from
water pump)
Too much play on pump shaft bearing. Replace.
Worn or damaged impeller shaft. Replace.
Worn or damaged mechanical seal. Replace.
Contact between pump case and
impeller.
Replace.
Condition Possible cause Correction / Reference Item
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