14. K-XCT 125 i FUEL SYSTEM (Auto Control Fuel Injection System) TROUBLESHOOTING Engine won't start Backfiring or misfiring during acceleration Battery voltage too low Ignition system malfunction Fuel level too low Pinched or clogged fuel hose Poor performance (drive ability) and poor Faulty fuel pump operating system fuel economy Clogged fuel filter (fuel pump) Pinched or clogged fuel hose Clogged fuel injector Faulty 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 14-4