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M10 plugs fouling?

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    M10 plugs fouling?

    My neighbor has an 84 318iA, and it keeps fouling the plugs after about 4 days of driving, to the point of not starting.

    The car recently (within last 4 months) passed emissions, so I don't believe it to be burning a ridiculous amount of oil.

    I changed the O2 sensor, the cap and rotor are new, the AFM has been replaced.

    Timing?
    Other ideas?
    The car seems to be running very rich, but I have not truly tested that.
    Joe Funk -- Portland Oregon
    That Guy.
    03 X5. 3 liter obviously.

    #2
    How many miles on the car Joe?
    What plugs are being used?
    Last valve adjustment?

    Comment


      #3
      so are the plugs just covered in soot or oil?
      can always go a bit hotter, BP4ES (NGK) could be the go?
      (not ideal but could work if you can't figure out the original problem)

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