10-4 SERVICING INFORMATION
Complaint
Symptom and possible causes
Remedy
Engine idles poorly
1. Valve clearance out of adjustment
2. Poor seating of valves
3. Defective valve guides
4. Worn down camshaft
5. Too wide spark plug gaps
6. Defective ignition coils
7. Defective CKP sensor
8. Defective ECM
9. Defective TP sensor
10. Defective fuel pump
11. Imbalanced throttle valve
12. Damaged or cracked vacuum hose
13. Damaged or clogged ISC valve
14. ISC bad learning
Adjust.
Replace or repair.
Replace.
Replace.
Adjust or replace.
Replace.
Replace.
Replace.
Replace.
Replace.
Adjust.
Replace.
Replace or repair.
Reset learned value.
Engine stalls often
Incorrect fuel/air mixture
1. Defective IAP sensor or circuit
2. Clogged fuel filter
3. Defective fuel pump
4. Defective fuel pressure regulator
5. Defective ECT sensor
6. Defective thermostat
7. Defective IAT sensor
8. Damaged or cracked vacuum hose
9. Damaged or clogged ISC valve
Fuel injector improperly operating
1. Defective fuel injectors
2. No injection signal from ECM
3. Open or short circuited wiring connection
4. Defective battery or low battery voltage
Control circuit or sensor improperly operating
1. Defective ECM
2. Defective fuel pressure regulator
3. Defective TP sensor
4. Defective IAT sensor
5. Defective CKP sensor
6. Defective ECT sensor
7. Defective fuel pump relay
8. Defective ISC valve
9. ISC bad learning
Engine internal parts improperly operating
1. Fouled spark plugs
2. Defective CKP sensor or ECM
3. Clogged fuel hose
4. Out of adjustment valve clearance
Repair or replace.
Clean or replace.
Replace.
Replace.
Replace.
Replace.
Replace.
Replace.
Replace or repair.
Replace.
Repair or replace.
Repair or replace.
Replace or recharge.
Replace.
Replace.
Replace.
Replace.
Replace.
Replace.
Replace.
Replace.
Reset learned value.
Clean.
Replace.
Clean.
Adjust.
Содержание GW250
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