Question about 2001 Audi A4

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2001 audi a4 1.8 random misfire

My car has a random misfire code p0300,p0301,p0303,p0304.i have change all spark plugs ,coils and my CEL keeps on coming back on .strange thing is it comes on when my car is hot like after i drive it for 20 mins on the road then CEL flashes then runs rough no power,,then CEL goes solid then car drives good ...then after CEL lights goes off. i really need some help

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  • badben360 May 25, 2009

    u think a bad plug wire will do this ? really weired comes on goes off.

  • badben360 May 25, 2009

    i'll call audi tomorrow for it and give it a shot...thank u keep updated

  • badben360 May 25, 2009

    Did u mean my ECM ,,,,i had ECM change last year in NOV/08

  • Dar
    Dar May 11, 2010

    They sure will.

  • Dar
    Dar May 11, 2010

    You haven't changed plug wires? Maybe try that.

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Do a compression test then do a combustion pressure test if all good computer is questionable

Posted on May 25, 2009

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Have you changed the coils at each misfing cylinder? I had a misfire on cylinder 3, running really rough with flashing check engine light when engine was warm. The Check Engine light did come on solid after the misfire cleared. Swapped the coil with another cylinder and the misfire code followed the coil, so I replaced the suspect coil with a known good one. Voila, problem solved. My vehicle is a 2001 Jetta 1.8t, and from what I've read on the internet, failing coils is a very common problem. Good luck.

Posted on Jun 25, 2009

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