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Discussion in '2005-2010 V6 Mustang Tech' started by Pete/Rt1100, Mar 9, 2018.

  1. Pete/Rt1100

    Pete/Rt1100 Member

    Nov 13, 2016
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    I have 2009 , 4Litre V6. Bought it with 20,000kms now 87,000kms. Has a misfire just above idle. It has given 0300 code once or twice which is random misfire code. Even at idle u will hear sputtering from time to time. Had this since the beginning of ownership. Changed plugs, wires, coil pack, Map sensor, fuel filter and oxygen sensors. Cleaned throttle body , smoke tested for vacuum leak, had computer reprogrammed at dealership. Still sputters. Car runs well otherwise. Anybody have similar symptoms or any ideas? help would be appreciated.

    Pete M.
    Last edited: Mar 9, 2018
  2. 08'MustangDude

    08'MustangDude Active Member

    Jan 31, 2018
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    Is it throwing a misfire code? Will tell you which cylinder it is.

    Next would be to check the MAF, injectors, then on to valves or timing...