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MK4 GTI Misfire

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  • #1

    MK4 GTI Misfire

    Hey all,
    Got a MK4 GTI thats not firing on 4 cylinders, we changed plugs and coil packs, thats not the problem. Is there any other common problems that it would be? Thought i would ask before i get deeper into it.
    MK4 GTI (KO4, GIAC)
    VW Kombi Ute 2ltr EFI
    Audi 90 20V Quattro
    Tags: None
  • #2
    Coil packs.

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    • #3
      H T Leads?
      sigpic Camden GTI Performance. VW / AUDI Specialists
      All Mechanical Work, Log book Servicing, New and used Parts and Imports
      19-20/6 Badgally Road, Campbelltown, 2560
      02 4627 3072 or 0423 051737 www.camdengti.com

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      • #4
        Originally posted by Golf Loon
        H T Leads?
        You mean connectors? The leads last forever. (They're copper)

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        • #5
          You need to scan it with VAG-COM the amount it can tell you is amazing.

          The only thing I have heard that fails all the time apart from coil packs is the water temp sender. Check you have a green one fitted the black ones are the duff ones.

          Gavin
          optimumcode@gmail.com | https://www.vwwatercooled.com.au/for...i-;-79012.html | https://www.facebook.com/TTY-Euro-107982291992533

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          • #6
            Originally posted by h100vw
            You need to scan it with VAG-COM the amount it can tell you is amazing.

            The only thing I have heard that fails all the time apart from coil packs is the water temp sender. Check you have a green one fitted the black ones are the duff ones.

            Gavin

            Vag com doesnt pick up misfires on a mk4 Golf .

            The ignition module is on the side of the airbox near the MAF . Disconnect it and clean the 2 plug terminals and put it back in . Sometimes that fixes the problem . If it doesnt work try and find another one to swap it with
            Bug_racer supports the rebellion of the euro revolution

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            • #7
              Syncro- Already changed coil packs, thats not the problem.

              Golf Loon- Are you getting this mixed up with a 1.6/2ltr? Unless you mean those leads to the coil packs.

              H100VW - Already changed the black temp probe to green a while back, I will scan it tomorow when i have time to look.

              Bug_racer - I will try that.

              Thanks for the info guys. I will look at it tommorow when i have time, i just thought there might be a common thing apart from coil packs.
              MK4 GTI (KO4, GIAC)
              VW Kombi Ute 2ltr EFI
              Audi 90 20V Quattro

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              • #8
                Can you isolate any particular cylinder?

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                • #9
                  i havn't even looked at the car yet, i will tommorow though.
                  MK4 GTI (KO4, GIAC)
                  VW Kombi Ute 2ltr EFI
                  Audi 90 20V Quattro

                  Comment

                  • #10
                    Originally posted by Bug_racer
                    Vag com doesnt pick up misfires on a mk4 Golf .
                    Is that a feature of the NA ECU cos I have seen it on 1.8Ts.

                    Gavin
                    optimumcode@gmail.com | https://www.vwwatercooled.com.au/for...i-;-79012.html | https://www.facebook.com/TTY-Euro-107982291992533

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                    • #11
                      Vag com doesnt pick up misfires on a mk4 Golf .

                      it does as has built in ociliscope

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                      • #12
                        Originally posted by william
                        Vag com doesnt pick up misfires on a mk4 Golf .

                        it does as has built in ociliscope
                        I think he may mean as a fault code in it's own right.
                        Gavin
                        optimumcode@gmail.com | https://www.vwwatercooled.com.au/for...i-;-79012.html | https://www.facebook.com/TTY-Euro-107982291992533

                        Comment

                        • #13
                          Bug Racer- You were right, it was the ignition control module, runs fine now! I tell you what a MK4 GTI with a KO4 turbo and a GIAC chip goes good as! I wanna get a Audi A4 1.8T Quattro with the same mod now lol.
                          MK4 GTI (KO4, GIAC)
                          VW Kombi Ute 2ltr EFI
                          Audi 90 20V Quattro

                          Comment

                          • #14
                            How do you know it is a misfire? Sorry for the silly question.. *newbie*

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                            • #15
                              Fuel pump and/or filter?:/

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