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Runs Rough and Flashing cel - With Pics

Discussion in '1994-2004 V6 Mustang Tech' started by V6 Stang Tuner, Apr 11, 2019.

  1. V6 Stang Tuner

    V6 Stang Tuner Member

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    Car started running rough other day, smell of rotten eggs and flashing check engine light. Pulled code, P0302, cyl 2 misfire. Pulled plug and had hard car on buildup. Will be changing plugs and see if it fixes the issue : IMG_20190411_201037.jpeg
     
  2. 6 Shooter

    6 Shooter Well-Known Member

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    Looks more like an injector stuck open.
     
  3. Sam36

    Sam36 Active Member

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    Yea not normal. Could be bad coil or injector, maybe bad spark plug but doubtful.
     
  4. six gun

    six gun Active Member

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    I wouldn't doubt a leaking injector, but once I had a problem with leaking valve seals that caused several spark plugs to foul up bad especially the rear ones.
     
  5. V6 Stang Tuner

    V6 Stang Tuner Member

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    Hoping it's just the plug, changed it and runs great now, smooth and strong.

    I did clean the upper intake and use a seafoam like cleaner as well last summer but see now that it's recommend to do plugs after that process so maybe that's why the plug had the hard carbon on it.
     
    HumanSVD likes this.
  6. V6 Stang Tuner

    V6 Stang Tuner Member

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    Found a cracked spark plug wire on #5 as well so changed all the wires with new set of NGK 8.0mm.

    Changed all plugs with NGK G-Power Platinums, only #2 was carboned. Running like new now, no more rough idle on startup. IMG_20190417_184632.jpeg IMG_20190417_184732.jpeg