Troubleshooting - KYMCO UXV 500i Service Manual

22. FUEL INJECTION SYSTEM

TROUBLESHOOTING

Engine won't start
• Battery voltage too low
• Fuel level too low
• Pinched or clogged fuel hose
• Faulty fuel pump operating system
• Clogged fuel injector
• Faulty spark plug or wrong type
• Clogged Airflow Bypass Valve
• Wet spark plug
Engine stall, hard to start, rough idling
• Intake air leak
• Fuel contaminated/deteriorated
• Pinched or clogged fuel hose
• Idle speed miss adjusted
• Wet spark plug
Backfiring or misfiring during acceleration
• Ignition system malfunction
Poor performance (drive ability) and poor
fuel economy
• Pinched or clogged fuel hose
• Faulty fuel injector
UXV 500i
22-8