Engine Won’t Start; Engine Stall, Hard To Start, Rough Idling; Backfiring Or Misfiring During Acceleration; Poor Performance (Drive Ability) And Poor Fuel Economy - KYMCO Super 8 50 Service Manual

5. 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 filter (fuel pump)
 Clogged fuel injector
 Faulty spark plug or wrong type
 Cut by ECU due to angle detect sensor or incorrect function

Engine stall, hard to start, rough idling

 Intake air leak
 Fuel contaminated/deteriorated
 Pinched or clogged fuel hose
 Idle speed misadjusted

Backfiring or misfiring during acceleration

 Ignition system malfunction
Poor performance (drive ability) and poor
fuel economy
 Pinched or clogged fuel hose
 Faulty fuel injector
Super 8 50
5-4