UH-OH I'm in Trouble! AAN help advice needed!

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  • 8valve
    S2Forum Tinkerer
    • Jun 2011
    • 5
    • Home: United States Current: Ireland

    #1

    UH-OH I'm in Trouble! AAN help advice needed!

    Right guys, had an intermittent misfire which turned into a permanent misfire.

    coil-pack, i thought...fitted a new one......still there.

    ignition module....fitted...misfire still there.

    checked all wiring for continuity etc, cleaned plugs, then replaced with new plugs.....still a misfire.

    plugs are getting sooted up when she's run.......

    she now won't take revs when you press the accelerator, and is running like a total pig, and blowing blue/white smoke under throttle load.

    compression check showing 150psi in all cylinders...all this info is from my best mate who's also my mechanic....we're stumped!

    HELP! please! Paul.
  • driftin jo
    S2Forum Fiend
    • Sep 2007
    • 2222
    • Country: United Kingdom

    #2
    MAF or MAF connector, either that or you have a big air leak.

    Comment

    • driftin jo
      S2Forum Fiend
      • Sep 2007
      • 2222
      • Country: United Kingdom

      #3
      One thing it could be is the ref hose to the fuel pressure regulator, if this has split then it will be way to rich at idle because the pressure will be too high, this will soot the plugs up very quick.

      You need to pull the codes from the ECU and see what it's saying, this will help diagnose what the cause is.

      Comment

      • 8valve
        S2Forum Tinkerer
        • Jun 2011
        • 5
        • Home: United States Current: Ireland

        #4
        Hey Jo, thanks for the tips..no error codes showing on diagnostics....

        Comment

        • s2_wot
          S2Forum Fiend
          • Aug 2006
          • 2178

          #5
          Have you checked the coil pack boots for damage?
          Shane

          Comment

          • 8valve
            S2Forum Tinkerer
            • Jun 2011
            • 5
            • Home: United States Current: Ireland

            #6
            yea, they're all intact....
            this has us driven nuts trying to trace it.....

            Comment

            • prj
              S2Forum Zealot
              • Mar 2010
              • 6308
              • Country: Estonia

              #7
              Disconnect the MAF, check if it gets better.
              http://tuner.ee - http://www.facebook.com/tuner.ee

              Comment

              • s2_wot
                S2Forum Fiend
                • Aug 2006
                • 2178

                #8


                May be useful?
                Shane

                Comment

                • UrS4boy
                  S2Forum Obsessed
                  • Feb 2006
                  • 11859
                  • Country: Canada

                  #9
                  Have you pulled (and replaced) the injectors, one by one, with the engine running at idle to determine which cylinder has dropped out? Once you know which cylinder, I would first check to see if that spark plug is tight and its coil to plug boot is in good condition. If the plug is tight, I would pull it and examine it. F5DP0Rs are starting to drop their electrodes.
                  RS2'd 93 UrS4 5 spd sedan
                  94 UrS4 V8 6 spd manual avant

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