Question about 1994 BMW 3 Series

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To continue with my last problem there is also Oil on 5 of the 6 spark plugs.... Any ideas?

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  • dawn_taylor Nov 02, 2008

    Hi, no abnormal oil use, no smoke - i don't think it is the rings. Im unsure of compression ratings too :(

    The prev post was the car is not starting, we have since figured that the fuel pump is not working, wether it is stuffed or it's not receiving power is now the question. Could the oil on the plugs be a build up from trying and failing to start the car soo many times?

    Do you know how to test the fuel pump for power? I have not had the car for long so i am unsure of where things are located - like relay's etc?


  • dawn_taylor Nov 02, 2008

    We determined that the pump is not working by testing all the little things fuses etc and following the fuel lines from the engine to after the filter (to see if filter was just blocked). and then from there back again to see if the pump was buggered. It's not making any noise when you turn the ignition (it's supposed to buzz?). And it started playing up, not starting etc a couple of days ago - but then it was fine. Which leads us to think that it's an electrical prob, loose wire etc? And that loose connection has now become a severed connection somewhere. I heard that you are supposed to check the relay's etc? Can you please tell me how to do this? Or do you know of a series of tests that one can perform to determine if it's electrical or a new pump is needed? I would rather not replace the fuel pump unless we can be absolutely sure that it's the problem, not the wireing leading into it... :)

    Thank you for your help.

  • Loringh
    Loringh May 11, 2010

    I may have missed a previous post but how many miles on this vehicle? Have you checked the compression on each cylinder? How much oil are you using? Are you leaving a smoke trail out the exhaust? Any sign of oil leaking out around the valve covers? Is the PVC valve all clogged up with oil?

    A little more info will help the diagnosis.




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I would suggest that you solve the fuel pump problem and then see if the oily spark plug problem goes away. You say that the fuel pump is not working. May I ask how you determined that? If you know for sure it's not working, suggest you replace the fuel pump and then see what the next step is.

good luck Loringh

Posted on Nov 02, 2008

  • Loringh
    Loringh Nov 03, 2008

    The way I would check the fuel pump is to make some voltage measurements with a voltmeter. If the pump were the intermittent problem one could see the voltage fluctuating on the meter. Unfortunately,
    the electrical problems require the correct instrumentation to troubleshoot.

    Perhaps there is a place where you can get a fuel pump, say a junk yard where you would not have to spring for a new one.

    Good luck Loringh



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