TROUBLESHOOTING GUIDE
F-65flowchartTroubleshooting steps 4-7 (RUNS ROUGH ON DECELERATION/BACKFIRE)
4
INSPECTIONCheck if fuel cut operation is OK during deceleration. Fuel cut: Above 1,900 rpm after warm-up.
RESULTYes
ACTIONGo to next step
4
INSPECTION
RESULTNo
ACTIONTry known good ECU (page F-127)
5
INSPECTIONRun engine several minutes at idle and check if fuel line pressure is held after ignition switch turned OFF (page F-102). Fuel line pressure: More than 147 kPa (1.5 kg/cm², 21 psi) for 5 min.
RESULTYes
ACTIONGo to next step
5
INSPECTION
RESULTNo
ACTIONCheck injector for fuel leakage (page F-113)
6
INSPECTIONCheck if air cleaner element is clean (page F-75)
RESULTYes
ACTIONGo to next step
6
INSPECTION
RESULTNo
ACTIONReplace (page F-75)
7
INSPECTIONTry known good ECU and check if condition improves (page F-127)
RESULT
ACTION