Help us help you. By posting the year, make, model and engine near the beginning of your help request, followed by the symptoms (no start, high idle, misfire etc.) Along with any prevalent Diagnostic Trouble Codes, aka DTCs, other forum members will be able to help you get to a solution more quickly and easily!
Car runs and idles
great. every once in awhile it misses bad. It normally doesnt throw a code but the codes that do return are 300 multiple cyl misfires and small evap leak. New coils plugs map crank sensor cam sensors etc. gonna change the fuel injectors next. Did have the dealer flash and update ecu. tossing parts. hope someone has an idea. thanks
You may want to look in OBD2 mode 6 data to identify specific cylinder(s) misfiring. How about freeze frame data? What are the conditions when mis occur, ie. cold/hot, idling or under load etc?
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Last edit: 4 years 2 months ago by juergen.scholl.
