Suzuki RM-Z450 - Page 55

TROUBLESHOOTING 3-3
Complaint Symptom and possible causes Remedy
Engine idles poorly. • Valve clearance out of adjustment
• Valve timing out of adjustment
• Poor seating of valves
• Worn valve guide
• Worn down camshafts
• Incorrect spark plug gap
• Defective ignition coil
• Defective CKP sensor
• Defective ECM
• Defective TP sensor
• Defective fuel pump
• Insufficient throttle cable play
Adjust
Adjust
Repair
Replace
Replace
Adjust
Replace
Replace
Replace
Adjust or replace
Replace
Adjust
Engine stalls often. Incorrect fuel/air mixture
• Defective IAP sensor or circuit
• Clogged fuel filter
• Defective fuel pump
• Defective fuel pressure regulator
• Defective ECT sensor
• Defective IAT sensor
Fuel injector improperly operating
• Defective fuel injector
• No injection signal from ECM
• Open or short circuited wiring connections
• Defective magneto
Control circuit or sensor improperly operating
• Defective ECM
• Defective fuel pressure regulator
• Defective TP sensor
• Defective CKP sensor
• Defective ECT sensor
• Defective IAT sensor
• Defective TO sensor
Engine internal parts improperly operating
• Fouled spark plug
• Defective CKP sensor or ECM
• Clogged fuel hose
• Valve clearance out of adjustment
Repair or replace
Replace
Replace
Replace
Replace
Replace
Replace
Repair or replace
Repair or replace
Replace
Replace
Replace
Replace
Replace
Replace
Replace
Replace
Clean
Replace
Clean
Adjust