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10-4
SERVICING
INFORMATION
ENGINE
Complaint Symptom and possible causes Remedy
Engine
will
not
start Compression
too
low
or is hard to start. 1. Out of adjustment tappet clearance. Adjust.
2. Worn valve guides or poor seating of valves. Repair or replace.
3. Mistiming valves. Adjust.
4. Excessively worn piston rings. Replace.
5. Worn-down cylinder bores. Replace.
6. Too slowly starter motor cranks. See electrical section.
7. Poor seating of spark plugs. Retighten.
Plug
not
sparking
1. Fouled spark plugs.
Clean.
2. Wet spark plugs.
Clean and dry.
3. Defective ignition coil. Replace.
4. Defective CKP sensor. Replace.
5. Defective ECM. Replace.
6. Open-circuited wiring connections. Repair or Replace.
No fuel reaching the intake manifold
1. Clogged fuel filter or fuel hose. Clean or replace.
2. Defective fuel pump. Replace.
3. Defective fuel pressure regulator. Replace.
4. Defective fuel injector. Replace.
5. Defective fuel pump relay. Replace.
6. Defective ECM. Replace.
7. Open-circuited wiring connections. Check and repair.
Incorrect fuel/air mixture
1. Out of adjustment TP sensor. Adjust.
2. Defective fuel pump. Replace.
3. Defective fuel pressure regulator. Replace.
4. Defective TP sensor. Replace.
5. Defective CKP sensor. Replace.
6. Defective lAP sensor. Replace.
7. Defective ECM. Replace.
8. Defective ECT sensor. Replace.
9. Defective IAT sensor. Replace.
10. Defective AP sensor. Replace.