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    #1

    Really cant find the problem...

    I just rebuilt my 88 325i from the head up. new spark plug wire, new spark plugs, fuel pump, fuel filter, o2 sensor, head gasket, head bolts, rotor button, coolant temp sensor, afm, cold air intake, and more. My car will sputter after 3 grand and die. I've replaced things because I thought it was the problem, but now im lost and im not sure what it is. It runs fine until the engine starts to warm up. Then it will sputter and I lose throttle. Only things I have in mind are crank position sensor and coil. Other than that im lost. Please help me out. And I also put injector cleaner in it. And when.it warms up.the check engine light for o2 sensor comes up, but i just put a new one in it. Thanks.

    Ashton.
    Last edited by ashton; 06-07-2011, 08:24 PM.
    Tags: None
    #2
    You can rule out crank position sensor. If that were the case, it wouldn't run at all.
    sigpic
    Turbo Cabrio project: http://eurowerks.org/showthread.php?t=19677

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      #3
      Originally posted by JTapper View Post
      You can rule out crank position sensor. If that were the case, it wouldn't run at all.
      Alright.

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        #4
        The "O2 sensor fault" and rough idle suggest intake leaks. The high rpm fault suggests a fuel delivery problem, bad harmonic balancer, weak CP, or bad engine harness. If it only happens when using a lot of throttle, the WOT switch in the TPS could be bad.

        Have a smoke test run on the intake and run the fuel system tests in the Bentley.
        The car makes it possible, but the driver makes it happen.
        Jim Levie, Huntsville, AL

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          #5
          Originally posted by jlevie View Post
          The "O2 sensor fault" and rough idle suggest intake leaks. The high rpm fault suggests a fuel delivery problem, bad harmonic balancer, weak CP, or bad engine harness. If it only happens when using a lot of throttle, the WOT switch in the TPS could be bad.

          Have a smoke test run on the intake and run the fuel system tests in the Bentley.
          Can you explain what the Bentley is and what is the website?

          Comment

            #6
            Originally posted by ashton View Post
            Can you explain what the Bentley is and what is the website?
            The bentley is the most widely used car repair manual for the e30.



            You should pick one up or at least google the PDF version.

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              #7
              Afm. And it could be ur cps if its just starting to go bad or Tps.

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                #8
                Originally posted by matt0300 View Post
                Afm. And it could be ur cps if its just starting to go bad or Tps.
                Alresdy replaced the afm. So cps or tps?

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                  #9
                  Originally posted by jlevie View Post
                  The "O2 sensor fault" and rough idle suggest intake leaks. The high rpm fault suggests a fuel delivery problem, bad harmonic balancer, weak CP, or bad engine harness. If it only happens when using a lot of throttle, the WOT switch in the TPS could be bad.

                  Have a smoke test run on the intake and run the fuel system tests in the Bentley.
                  I took my tps off and there was oil in it. Is that a problem?

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                    #10
                    I would swap it, I have an extra if u need one

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                      #11
                      Originally posted by matt0300 View Post
                      I would swap it, I have an extra if u need one
                      How much? And would my exhaust being unbolted from the resignator back cause any problems due to less back pressure?

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                        #12
                        You can have my old coil if you want it, as long as you pay the shipping. I put a new one on mine just for piece of mind, but it was working fine when I took it off.
                        Originally posted by LJ851
                        kingston is the play by play announcer for this thread.
                        ‘Tis by the grace of God that my cars run!

                        Originally posted by unloadedak
                        #teamross
                        Siobhan's Build Thread - UPDATED!

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                          #13
                          I had a similar problem years ago, changed the wiring harness, and it ran fine. Only changed the harness because I had tried everything else already.

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