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    #1

    Icv?

    I have had a surging idle for quite some time now. Every time I come up to a stop sign or sit in traffic, it goes from 500 to 950 rpms at a constant rate. Today when I got home from driving I popped the hood and unplugged the ICV and the idle was a bit high but didnt surge anymore. Is this a good sign that it is time for it to be replaced? I tried testing it but it is in the most inconvienent place (sandwiched between the intake mani and the firewall) and I dont know if I was getting accurate readings.

    I would like to know that is what is causing this idle problem before I go pick up a new one.

    I did recently replace: intake manifold gasket, most all vaccum lines, FPR, Fuel Pump and the TPS has the correct resistance for idle and WOT.

    Thanks in advance.

    Aaron
    Tags: None
    #2
    try spraying the valve with some brake cleaner and see if that helps.
    Build thread

    Bimmerlabs

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      #3
      Originally posted by nando
      try spraying the valve with some brake cleaner and see if that helps.
      Ditto. Give it a good cleaning.
      Adam Fogg- '88 M3

      Common sense- It's the new 'gifted'

      Comment

        #4
        I will try that again. I have sprayed it a few times in the past and it doesnt seem to do much. If that still doesnt solve the issue, is it a good possibility it is the ICV. It doesnt cost "that" much, so I might just pick one up.

        Thanks

        Aaron

        Comment

          #5
          Originally posted by aaron_silva
          I will try that again. I have sprayed it a few times in the past and it doesnt seem to do much. If that still doesnt solve the issue, is it a good possibility it is the ICV. It doesnt cost "that" much, so I might just pick one up.

          Thanks

          Aaron
          318s have a lot of vacuum leak potential too. I'd check that as well.
          Adam Fogg- '88 M3

          Common sense- It's the new 'gifted'

          Comment

            #6
            While I had the ICV out of the car I tested the resistance across the terminals and got a reading of 8.2 ohms. Does that mean anything to anybody?

            Also, does the little valve inside th ICV turn freely? I stuck a small pick and put a little pressure on it and it did not budge.

            Thanks

            Aaron

            Comment

              #7


              That piece inside doesnt move. Is it supposed be like that.

              Aaron

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                #8
                ummm i beleive its supposed to move?..everytime ive cleaned mine ive been able to move it freely?

                Comment

                  #9
                  Update for future reference:

                  After spraying the ICV, the idle seems to be a bit more normal. I still have a temporary drop in idle speed when the car comes to a stop, but it immediately returns to normal.

                  Thanks

                  Aaron

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