getting spring boost

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  • pasbogdan
    S2Forum Extremist
    • Sep 2009
    • 1160
    • Country: Romania

    #1

    getting spring boost

    What reaction is that?
    Starting engine,wot untill 6500 rpm boost is where it should be.
    After leaving throttle and wot again boost is spring value(0.5).This is only i can get untill i restart engine.The story is the same(first wot ok,others 0.5 bar).

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

    #2
    Error codes?

    Bad TPS connection can do this.
    Too much boost can do it too, but then it would cut at 6500 RPM, not next time when you get on throttle.
    http://tuner.ee - http://www.facebook.com/tuner.ee

    Comment

    • rj scotty
      S2Forum Fiend
      • May 2006
      • 2195
      • Home: United Kingdom Current: England

      #3
      Faulty knock sensor/s also in my limited experience
      sigpic
      "For what you spent on that you could have brought a new car"
      BUT I DON'T WANT A NEW CAR!

      1995 S2 Avant, Volcano Black
      1982 VW Golf Mk1, primer yellow, will be finished one day, maybe.
      2003 VW T4 long nose X pack, (has become project)

      Comment

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

        #4
        If there are codes for knock sensors, yes.
        Otherwise, if they are overtorqued, it will pull boost and timing all the time.

        Not just when you let off the throttle. I think wait for him to read codes, maybe it is something really simple.
        http://tuner.ee - http://www.facebook.com/tuner.ee

        Comment

        • rj scotty
          S2Forum Fiend
          • May 2006
          • 2195
          • Home: United Kingdom Current: England

          #5
          I've had it on long motorway runs. Your call for boost and only get 0.4. Turn the ignition off and back on again and all is well. We concluded it was faulty(over torqued/nakerd) knock sensors, but I cant remember how we reached that conclusion

          Do knock sensors through fault codes ?

          cheers

          rich
          sigpic
          "For what you spent on that you could have brought a new car"
          BUT I DON'T WANT A NEW CAR!

          1995 S2 Avant, Volcano Black
          1982 VW Golf Mk1, primer yellow, will be finished one day, maybe.
          2003 VW T4 long nose X pack, (has become project)

          Comment

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

            #6
            His issue is that his boost is fine until he lifts off the throttle and tries again.
            If motronic senses knock it'll instantly start dropping boost. Same goes if you exceed boost or fuel cut threshold, it'll instantly drop it.
            That's why I think maybe it's a bad TPS connection...

            But... it's just guessing games. Anyone could be right... it's better to wait until the codes are pulled.
            http://tuner.ee - http://www.facebook.com/tuner.ee

            Comment

            • pasbogdan
              S2Forum Extremist
              • Sep 2009
              • 1160
              • Country: Romania

              #7
              00519 code.
              Hose to moisure trap not conected.
              As i told my tunner,his software/boost maps are to bad.Things are expoloding in my car.The ecu can be pushed from its boost line and can break my dash and windshield
              Now,finaly everything is what i wanted
              Anyway,code was something like signal to high.
              But how he worked this way?first wot fine boost,seccond 0.5?
              Or hose was almost down and when i lifted the plastic cover from the rear of the engine hose faled down...
              What pasion can be that?you see how the car workes for 20 min it breaks and you are working days to repair.And again and again.But the sensation of 20 v t keeps you going.
              Thanks for help!!

              Bogdan

              Comment

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

                #8
                Haha, glad it was okay in the end
                Enjoy the 1.55 bar boost.
                http://tuner.ee - http://www.facebook.com/tuner.ee

                Comment

                • pasbogdan
                  S2Forum Extremist
                  • Sep 2009
                  • 1160
                  • Country: Romania

                  #9
                  1.55 was my secret.People should think i have 2.5 bar

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