Engine General Information and Diagnosis: 1A-10
Engine stalls often (Fuel
injector improperly
operating)
Defective fuel injectors. 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 CKP sensor. Replace.
Defective ECT sensor. Replace.
Defective fuel pump relay. Replace.
Defective ISC valve. Replace.
Engine stalls often
(Engine parts improperly
operating)
Fouled spark plugs. Clean.
Defective CKP sensor or ECM. Replace.
Clogged fuel hose. Clean.
Out of adjustment tappet clearance. Adjust.
Engine noisy (Excessive
valve chatter)
Too large tappet clearance. Adjust.
Weakened or broken valve springs. Replace.
Worn tappet or cam surface. Replace.
Worn and burnt camshaft journal. Replace.
Engine noisy (Noise
seems to come from
piston)
Worn down pistons or cylinders. Replace.
Combustion chambers fouled with
carbon.
Clean.
Worn piston pins or piston pin bores. Replace.
Worn piston rings or ring grooves. Replace.
Engine noisy (Noise
seems to come from
timing chain)
Stretched chain. Replace.
Worn sprockets. Replace.
Tension adjuster not working. Repair or replace.
Engine noisy (Noise
seems to come from
crankshaft)
Rattling bearings due to wear. Replace.
Worn and burnt big-end bearings. Replace.
Worn and burnt journal bearings. Replace.
Too large thrust clearance. Replace thrust bearing.
Engine noisy (Noise
seems to come from
clutch)
Worn splines of countershaft or hub. Replace.
Worn teeth of clutch plates. Replace.
Distorted clutch plate, driven and drive. Replace.
Worn clutch release bearing. Replace.
Engine noisy (Noise
seems to come from
transmission)
Worn or rubbing gears. Replace.
Worn splines. Replace.
Worn or rubbing primary gears. Replace.
Worn bearings. Replace.
Engine noisy (Noise
seems to come from
water pump)
Worn or damaged impeller shaft. Replace.
Worn or damaged mechanical seal. Replace.
Contact between pump case and
impeller.
Replace.
Too much play on pump shaft bearing. Replace.
Condition Possible cause Correction / Reference Item
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