Turbo boost.......problems

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  • wastegates
    S2Forum Addict
    • Dec 2004
    • 351
    • Country: Spain

    #46
    Hello friends, little by little it seems that the car is better.

    I would be interested to know the pressures of the turbo in each gear, how much the pressure increases in 1ª, 2ª, 3ª, 4ª 5ª and 6ª.
    I carry the reprogramming of Paul Nugent.

    Let's see if I can solve the doubts.
    Charles

    Audi S2 Coupe ABY 1994
    Barcelona

    Comment

    • wastegates
      S2Forum Addict
      • Dec 2004
      • 351
      • Country: Spain

      #47
      Hello, today I tested the membrane tightness, it is perfect, withstand the vacuum correctly.

      Can anyone tell me the turbo pressures at about different gears?


      Charles

      Audi S2 Coupe ABY 1994
      Barcelona

      Comment

      • wastegates
        S2Forum Addict
        • Dec 2004
        • 351
        • Country: Spain

        #48
        Hello friends, we continue to review.

        I was in doubt if the potentiometer (G69) with the throttle open was 94; 5% in VagCom and could get to 100% would get oberboost.

        Well, with patience, I've got VagCom with maximum open throttle indicating 99% .......... and the cut-off switch on throttle rest.

        Result ?, it works the same as before, not improved anything, and I write it in case someone thinks that reaching 100% will get better result, but it seems that not.

        Let's see if you give me some more tips.
        Charles

        Audi S2 Coupe ABY 1994
        Barcelona

        Comment

        • wastegates
          S2Forum Addict
          • Dec 2004
          • 351
          • Country: Spain

          #49
          I'm starting to worry about whether the catalytic converters or the intercooler are clogged.

          How could you check them?
          Charles

          Audi S2 Coupe ABY 1994
          Barcelona

          Comment

          • mike74
            S2Forum Maniac
            • Apr 2014
            • 615
            • Country: Scotland

            #50
            You could remove the lambda sensor to see if it's the exhaust that's clogged. If it runs better without it then that could be the issue. If that doesn't work remove the intercooler and thoroughly wash it out with petrol

            Comment

            • wastegates
              S2Forum Addict
              • Dec 2004
              • 351
              • Country: Spain

              #51
              Thanks Mike, I went back to do a pressure test circuit and found an air leak at the outlet of the intercooler, had loosened the clamps, solve it thinking that I had finally found the problem but no, continue the same.

              How do I check by removing the lambda? I'm going to escape free?
              Charles

              Audi S2 Coupe ABY 1994
              Barcelona

              Comment

              • mike74
                S2Forum Maniac
                • Apr 2014
                • 615
                • Country: Scotland

                #52
                Yes, just remove lambda from exhaust and try car on the road ��

                Comment

                • wastegates
                  S2Forum Addict
                  • Dec 2004
                  • 351
                  • Country: Spain

                  #53
                  Hi, I had some spare catalysts and I replaced them, it does not smell badly and it seems that more pressure comes out of the exhaust pipe but there has not been any change, it stays the same.

                  I have disconnected the N75 to test the mechanical pressure of the wastegate and it costs you to climb a lot up to 0.5 bar, it comes keeping the throttle to the maximum ........... few things I have to look ..... .......any advice ?.

                  Thanks
                  Charles

                  Audi S2 Coupe ABY 1994
                  Barcelona

                  Comment

                  • wastegates
                    S2Forum Addict
                    • Dec 2004
                    • 351
                    • Country: Spain

                    #54
                    LEAK

                    Charles

                    Audi S2 Coupe ABY 1994
                    Barcelona

                    Comment

                    • wastegates
                      S2Forum Addict
                      • Dec 2004
                      • 351
                      • Country: Spain

                      #55
                      LEAK

                      Charles

                      Audi S2 Coupe ABY 1994
                      Barcelona

                      Comment

                      • wastegates
                        S2Forum Addict
                        • Dec 2004
                        • 351
                        • Country: Spain

                        #56
                        Fix them this week but the car stays the same.
                        Charles

                        Audi S2 Coupe ABY 1994
                        Barcelona

                        Comment

                        • Rikki Kitto
                          S2Forum Zealot
                          • Feb 2010
                          • 6276
                          • Country: England

                          #57
                          Originally posted by wastegates
                          Hello, today I tested the membrane tightness, it is perfect, withstand the vacuum correctly.

                          Can anyone tell me the turbo pressures at about different gears?


                          Just a heads up on your boost pipe clipsI had to change mine back to normal width clips as could never get an air tight fit with these, always a source of boost leaks for me

                          Comment

                          • Rikki Kitto
                            S2Forum Zealot
                            • Feb 2010
                            • 6276
                            • Country: England

                            #58
                            And do this MarkH mod to the IC
                            Attached Files

                            Comment

                            • wastegates
                              S2Forum Addict
                              • Dec 2004
                              • 351
                              • Country: Spain

                              #59
                              If Rikki, yes, for years I had the new sleeve saved to install it, I have already put it and it is already solved .......................
                              But it is incredible, I'm looking for and leave all sorts of problems and still unresolved.

                              apologize to everyone for the translation (google translate)


                              Thanks Rikki
                              Charles

                              Audi S2 Coupe ABY 1994
                              Barcelona

                              Comment

                              • wastegates
                                S2Forum Addict
                                • Dec 2004
                                • 351
                                • Country: Spain

                                #60
                                Hi again, can someone tell me if the ignition timing is normal?, The idle stays at 4.5 as you can see in the video, is it normal?

                                Charles

                                Audi S2 Coupe ABY 1994
                                Barcelona

                                Comment

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