Same old problem - but we're getting closer!

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  • Jamie
    S2Forum Fanatic
    • Nov 2003
    • 83
    #1

    Same old problem - but we're getting closer!

    Chaps/Chapeses

    Please help me with this. The problem is long running, I have explained it here before and many here have experienced the same issue for different reasons.

    The car stutters violently under hard acceleration. Investigations so far have ruled out the following:-

    Boost leak - albeit maybe this needs triple checking
    Faulty Potentiometer

    Potential causes not yet ruled out:-

    Knock sensors.

    I have recently had the car serviced and the following fault codes have been reported:-

    1)00544 - Max change air pressure exceeded - incorrect signal
    2)00561 - Mixture adjustment - adaptation limit (mult) not reached

    In addition, Paul is about to give me a re-map. I am about to swap over ecu’s and send mine to him for some serious steroid treatment. However, I will be at Castle Combe on Saturday and it may be best to leave my ecu in until then and get the opinions of you more experienced folk…not to mention the fact I don’t know how to swap them.

    My questions therefore:

    1) Does anyone know the direct causes of these fault codes other than the description provided (ie what does it mean).
    2) Can someone take a look at the car on Saturday…possibly…pretty please.
    3) Can someone show me how to swap the ecu over.

    Thanks boys and girls.

    Jamie
    J
    Tags: None
    • S2central.net
      Retired OG Mod
      • Jul 2003
      • 16590
      • Country: Northern Ireland
      #2
      Jamie - I wasn't aware you had running problems before sending the ECU. That's OK as long as you know it won't be a miracle cure for running problems.

      My suggestions -

      Air leak - make absolutely certain its air tight - including braided control hoses
      Faulty MAF or dirty connector
      Faulty WGFV
      Faulty TBV (corresponds to air leak really)
      Split WG diaphragm
      Throttle pot
      Ambient pressure sender (passenger side A-pillar)


      Its a good idea to renew the lambda probe unless you know its fresh. Knock sensors are a ****** - hard to test unless one is o/c or s/c.

      Finally - make sure to RESET the ECU to clear the fault codes. There is a chance you are carrying old fault codes around. Do this BEFORE swapping any more components... And if the fault returns you must reset it each time...

      Note - The ECU swap is a 10 minute job for anyone that has done it before.

      Paul


      Originally posted by Jamie
      Chaps/Chapeses

      Please help me with this. The problem is long running, I have explained it here before and many here have experienced the same issue for different reasons.

      The car stutters violently under hard acceleration. Investigations so far have ruled out the following:-

      Boost leak - albeit maybe this needs triple checking
      Faulty Potentiometer

      Potential causes not yet ruled out:-

      Knock sensors.

      I have recently had the car serviced and the following fault codes have been reported:-

      1)00544 - Max change air pressure exceeded - incorrect signal
      2)00561 - Mixture adjustment - adaptation limit (mult) not reached

      In addition, Paul is about to give me a re-map. I am about to swap over ecu’s and send mine to him for some serious steroid treatment. However, I will be at Castle Combe on Saturday and it may be best to leave my ecu in until then and get the opinions of you more experienced folk…not to mention the fact I don’t know how to swap them.

      My questions therefore:

      1) Does anyone know the direct causes of these fault codes other than the description provided (ie what does it mean).
      2) Can someone take a look at the car on Saturday…possibly…pretty please.
      3) Can someone show me how to swap the ecu over.

      Thanks boys and girls.

      Jamie
      Paul Nugent
      Webmaster http://S2central.net
      Administrator http://S2forum.com

      1994 S2 Coupe ABY - aka Project Lazarus
      2001 A6 allroad 2.5TDi - family tank
      2003 S4 Avant 4.2 V8 - daily burble

      Purveyor of HomeFries and Exclusive agent for Samco hose kits (S2/RS2)

      There are only 10 kinds of people that understand binary - those that do, and those that don't

        Comment

        • s2avant95M
          S2Forum Extremist
          • Mar 2004
          • 1217
          • Home: England Current: United States
          #3
          Jamie, Also i think people on this forum have cured similar problems by replacing the spark plugs.
          Tim

          1995 S2 Avant, ruby red - ** SOLD TO ROSS **
          Golf Rallye G60 ** SOLD **
          Golf MK2 Oaky with R32 engine
          Audi A6 Avant 1.9 TDi 130
          Golf MK2 8v Race car

            Comment

            • dan_b
              S2Forum Possessed
              • Sep 2003
              • 3670
              • Home: United Kingdom Current: England
              #4
              Originally posted by S2central.net
              Jamie - I wasn't aware you had running problems before sending the ECU. That's OK as long as you know it won't be a miracle cure for running problems.

              My suggestions -

              Air leak - make absolutely certain its air tight - including braided control hoses
              Faulty MAF or dirty connector
              Faulty WGFV
              Faulty TBV (corresponds to air leak really)
              Split WG diaphragm
              Throttle pot
              Ambient pressure sender (passenger side A-pillar)


              Its a good idea to renew the lambda probe unless you know its fresh. Knock sensors are a ****** - hard to test unless one is o/c or s/c.

              Finally - make sure to RESET the ECU to clear the fault codes. There is a chance you are carrying old fault codes around. Do this BEFORE swapping any more components... And if the fault returns you must reset it each time...

              Note - The ECU swap is a 10 minute job for anyone that has done it before.

              Paul

              Do you have an ABY? If so, would also suspect knackered Coilpacks?
              Ex S2 owner, now running around in an A4 Avant quattro...

                Comment

                • S2central.net
                  Retired OG Mod
                  • Jul 2003
                  • 16590
                  • Country: Northern Ireland
                  #5
                  Originally posted by dan_b
                  Do you have an ABY? If so, would also suspect knackered Coilpacks?
                  Agree - but these are best checked last - lots of other things more likely to go wrong !


                  Paul
                  Paul Nugent
                  Webmaster http://S2central.net
                  Administrator http://S2forum.com

                  1994 S2 Coupe ABY - aka Project Lazarus
                  2001 A6 allroad 2.5TDi - family tank
                  2003 S4 Avant 4.2 V8 - daily burble

                  Purveyor of HomeFries and Exclusive agent for Samco hose kits (S2/RS2)

                  There are only 10 kinds of people that understand binary - those that do, and those that don't

                    Comment

                    • Jamie
                      S2Forum Fanatic
                      • Nov 2003
                      • 83
                      #6
                      Originally posted by S2central.net
                      Agree - but these are best checked last - lots of other things more likely to go wrong !


                      Paul
                      Thanks boys.

                      Spark plugs just been changed.

                      i know the re-map wont cure problems and that i wont feel the benefit until i have cured the problem, but am keen for you to do it and ill try and get the problem sorted in the interim.

                      I have an ABY - coil packs!!! - expensive

                      Ill run through your list (hopefully some of them tomorrow with some friendly people) and see what we can eliminate.

                      J
                      J

                        Comment

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