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