Suzuki GSX-R750, Service Manual

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SERVICING INFORMATION 8-5
Complaint Symptom and possible causes Remedy
Engine idles poorly. 1. Out of adjustment valve clearance. Adjust.
2. Poor seating of valves. Replace or repair.
3. Defective valve guides. Replace.
4. Worn down camshaft. Replace.
5. Too wide spark plug gaps. Adjust or replace.
6. Defective ignition coil/plug cap. Replace.
7. Defective crankshaft position sensor. Replace.
8. Defective ECM. Replace.
9. Defective throttle position sensor. Replace.
10. Defective fuel pump. Replace.
11. Imbalanced throttle valve. Adjust.
12. Damaged or cracked vacuum hose. Replace.
Engine stalls easily. Incorrect fuel/air mixture
1. Defective intake air pressure sensor or circuit. Repair or replace.
2. Clogged fuel filter. Clean or replace.
3. Defective fuel pump. Replace.
4. Defective fuel pressure regulator. Replace.
5. Defective engine coolant temp. sensor. Replace.
6. Defective thermostat. Replace.
7. Defective intake air temp. sensor. Replace.
Improperly working fuel injector
1. Defective fuel injector. Replace.
2. No injection signal from ECM. Repair or replace.
3. Open or short circuited wiring connection. Repair or replace.
4. Defective battery or low battery voltage. Replace or recharge.
Improperly working control circuit or sensors
1. Defective ECM. Replace.
2. Defective fuel pressure regulator. Replace.
3. Defective throttle position sensor. Replace.
4. Defective intake air temp. sensor. Replace.
5. Defective camshaft position sensor. Replace.
6. Defective crankshaft position sensor. Replace.
7. Defective engine coolant temp. sensor. Replace.
8. Defective fuel pump relay. Replace.
Improperly working engine internal parts
1. Fouled spark plugs. Clean.
2. Defective crankshaft position sensor or ECM. Replace.
3. Clogged fuel hose. Clean.
4. Out of adjustment tappet clearance. Adjust.