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M20 revs down then a little up when gassing it

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    #16
    My opinion is that these types of small things are given up on or never considered by some people that jump to M50 swaps. Once you get the M20 running properly it gives great performance.

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      #17
      I'm with Jim here, it has to be intake leaks
      1989 cirrisblau-metallic 325i

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        #18
        Spray some carb/brake cleaner in each single hose.. if it revs up while doin it it means u have a vaccum leak. hope it helps u.
        no more boosted m20, 91 318i...

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          #19
          spray some brake/carb cleaner, if it revs up where u sprayd it, it mean u have a leak, also check the little hose its under the trhottle body
          Last edited by matias88e30; 01-27-2011, 09:51 PM. Reason: eeee? sorry for double answer this thread
          no more boosted m20, 91 318i...

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            #20
            I already did it with carb cleaner. Idle stays fine. After driving with the new afm. It felt smoother. Im changing the spark plugs tomorrow, they look worn when I checked them earlier. What plugs do you guys use? What brand and model? I dont need fancy ones. Thanks for the input guys appreciate it =)

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              #21
              W8LCR. Last time I bought them locally they cost me $12 for the whole set.

              Ich gehöre nicht zur Baader-Meinhof Gruppe

              Originally posted by Top Gear
              Just imagine waking up and remembering you're Mexican.

              Every time you buy a car with DSC/ESC, Jesus kills a baby seal. With a kitten.


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                #22
                Icv.
                Your signature picture has been removed since it contained the Photobucket "upgrade your account" image.
                ---------------------------------
                89 E30 S52
                ---------------------------------
                Transaction Feedback.

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                  #23
                  Originally posted by bernzpeed View Post
                  Icv.
                  Couldnt be, Its not an idle problem. more of like power problem. It runs smooth now since I changed the AFM.

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