Engine Miss firing

Discussion in '94-04 V6 Mustang' started by 94stangfan, Mar 5, 2004.

  1. 94stangfan Member

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    All,

    I had an oil pump go on my engine, so I bought a used one from a junk yard. The engine looks rebuilt.

    After installing and starting, I found I have a miss-fire on Cyl 3. Does anyone have any idea what would cause this?

    Thanks,

    Keith
    94stangfan, Mar 5, 2004
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  2. 94stangfan Member

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    One thing I forgot to mention is that I do have the Check Engine Light on. I read the code and it is a P0303. Which says Cyl 3 is misfiring.
    94stangfan, Mar 5, 2004
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  3. dastang2 Active Member

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    try switching a known good spark plug in 3 and see what happens. do a compression test too.
    dastang2, Mar 5, 2004
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  4. 94stangfan Member

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    It was an ID10T Error... I had to replace my fuel rails when putting the new engine in. I must have accidently unplugged that injector. That was my problem.

    Problem Solved....

    Thanks,

    Keith
    94stangfan, Mar 5, 2004
    #4

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