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    Problem at Idle...

    HELP!

    Intermittent issue with my '89 325i. Its not Idle Air Control, MAF Sensor, timing, or anything else really obvious. Just wondering if anyone has known it to be anything else.



    thanks!

    #2
    vacuum leak

    Comment


      #3
      not vacuum leak. Don't hear it and would a vacuum problem always happen? it wouldn't be this intermittent.

      Comment


        #4
        do you have a bentley?
        you need to go through and start troubleshooting everything.

        Comment


          #5
          you wont necessarily hear a vacuum leak...smoke test is the only way....

          Comment


            #6
            Originally posted by BergerNJ View Post
            you wont necessarily hear a vacuum leak...smoke test is the only way....
            1974.5 Jensen Healey : 2003 330i/5

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              #7
              sometimes wrong valve adjustment causes this too, but if you cant get a smoke machine for the leack test, get a plastic small diameter but maybe 3 foot long tube and place one end to your ear and the other end prob the locations you think might leack air, one place that goes mostly unnoticed is the "O"rings for injectors, you wont hear it when the engine running by listening to it, but with a tube you can clearly hear a hisssing noise when the engine is running.
              Good luck
              Henry
              and I hope your plugs are not platinum Bosch

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                #8
                either a vacume leak or its your MAF.

                Comment


                  #9
                  check that intake boot. notorious for cracks...otherwise get out a multimeter and get readings from each sensor and match it up with the bentley readings to see if they're good.

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                  Originally posted by scabzzzz
                  I stand up, pull my dick out, and asked my gf to give me some noggin... Well, she starts laughing at me and I freaked out and ran off and locked myself in a bedroom.
                  1989 325i - Project/weekend driver
                  2002 325i - DD
                  2005 Suzuki SV650 - Toy

                  Comment


                    #10
                    here is your prob, throttle position sensor

                    Comment


                      #11
                      Get a can of carb cleaner and go nuts

                      Comment


                        #12
                        have you had the intake off
                        Big Mike Hunter
                        BMW Enthusiast
                        Not2Close Motorsports

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                          #13
                          Check this out: http://www.verrill.com/car/idle/e30_idleproblem.shtml

                          HTH

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