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10-10 SERVICING INFORMATION
Complaint Symptom and possible causes Remedy
Engine lacks power. Defective engine internal/electrical parts
1. Loss of tappet clearance
2. Weakened valve springs
3. Valve timing out of adjustment
4. Worn piston rings or cylinders
5. Poor seating of valves
6. Fouled spark plugs
7. Incorrect spark plugs
8. Clogged fuel injectors
9. Defective secondary fuel injectors
10. TP sensor out of adjustment
11. Clogged air cleaner element
12. Imbalancing throttle valve synchronization
13. Sucking air from throttle valve or vacuum hose
14. Too much engine oil
15. Defective fuel pump or ECM
16. Defective CKP sensor and ignition coils
Defective control circuit or sensor
1. Low fuel pressure
2. Defective TP sensor
3. Defective IAT sensor
4. Defective CMP sensor
5. Defective CKP sensor
6. Defective GP sensor
7. Defective IAP sensor
8. Defective ECM
9. Defective AP sensor
10. TP sensor out of adjustment
11. Defective STP sensor and/or STVA
12. Defective EXCVA
Adjust.
Replace.
Adjust.
Replace.
Repair.
Clean or replace.
Adjust or replace.
Replace.
Replace.
Adjust.
Replace.
Adjust.
Retighten or replace.
Drain out excess oil.
Replace.
Replace.
Repair or replace.
Replace.
Replace.
Replace.
Replace.
Replace.
Replace.
Replace.
Replace.
Adjust.
Replace.
Replace.