3B boost problem (again...)

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  • max_s2
    S2Forum Addict
    • Mar 2006
    • 498
    • Country: Latvia

    #16
    Yes, we disconnected and test-drived without collant temp. sensor and without MFTS - that same.

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    • 220bhp
      S2Forum Fiend
      • Nov 2004
      • 2578
      • Home: United Kingdom

      #17
      I see no mention of knock sensors, these are classic symptoms.

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      • max_s2
        S2Forum Addict
        • Mar 2006
        • 498
        • Country: Latvia

        #18
        Hm. Ho faults about knock sensors however. Is there a way how to check them?

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        • max_s2
          S2Forum Addict
          • Mar 2006
          • 498
          • Country: Latvia

          #19
          Today we'll swap knock sensors from my S2 and check F96 sensor.
          Just a question: are both knock sensors identical (as far as I know, only duo to the cable lenght they have different VAG codes)?

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          • max_s2
            S2Forum Addict
            • Mar 2006
            • 498
            • Country: Latvia

            #20
            no changes.. still 0.5bar

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            • 220bhp
              S2Forum Fiend
              • Nov 2004
              • 2578
              • Home: United Kingdom

              #21
              Yes the the two knock sensors are the same apart from the cable length,
              Did you pull the motor fuse or disconect the battery,to reset the ECU, if not the car will still be the same.

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              • max_s2
                S2Forum Addict
                • Mar 2006
                • 498
                • Country: Latvia

                #22
                What to reset if no faults have been found? We check faults before test-drive after any hardware change.

                Maybe turbocharger cannot handle proper pressure? It boosts so damn slow. I never seen that boost comes up so slowly.. can someone comment this?
                Tomorrow we'll try to replace whole WG.

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                • max_s2
                  S2Forum Addict
                  • Mar 2006
                  • 498
                  • Country: Latvia

                  #23
                  Question: if I pressurize WG lower camber, it MUST hold pressure or must open only when the pressure is higher?
                  The thing is, that we cannot even pressurize by 0.2bar, it immediately goes out. Is this normal?

                  Comment

                  • kwlw
                    S2Forum Extremist
                    • Sep 2004
                    • 1025
                    • Country: Lithuania

                    #24
                    Originally posted by lv_max
                    Question: if I pressurize WG lower camber, it MUST hold pressure or must open only when the pressure is higher?
                    The thing is, that we cannot even pressurize by 0.2bar, it immediately goes out. Is this normal?
                    No

                    Sau
                    200 20vt 88' 3b, human carrier
                    CQ typ85 with AAN inside, see project blog at http://kwlw.blogspot.com

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                    • max_s2
                      S2Forum Addict
                      • Mar 2006
                      • 498
                      • Country: Latvia

                      #25
                      "No" to what exactly?

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                      • Donker
                        S2Forum Enthusiast
                        • Nov 2006
                        • 119
                        • Country: Sweden

                        #26
                        Ehm, have you checked your turbo sir?
                        S2 sold.

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                        • Tonks4x4
                          Retired OG Mod
                          • Nov 2005
                          • 3062
                          • Country: United Kingdom

                          #27
                          The turbo must be ok as he produced 1.3 bar when the N75 was bypassed...
                          Audi Nut!!!

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                          • max_s2
                            S2Forum Addict
                            • Mar 2006
                            • 498
                            • Country: Latvia

                            #28
                            Changed WG, nothing changed at all. Still the same boost.
                            We figured out that car after ECU swap MUST be driven-in, so in the beginning it may not boost correct. Anyone knows something about this? Is there a strict way how to do this?
                            Will try this today/tomorrow.

                            Comment

                            • andrix
                              S2Forum Fanatic
                              • Jan 2007
                              • 68
                              • Country: Latvia

                              #29
                              visas trubas esat paarbaudiijushi ? nav nekur caurums ?

                              Comment

                              • fixers
                                S2Forum Tinkerer
                                • Aug 2009
                                • 1
                                • Country: United States

                                #30
                                ja esam, parbaudijam ar spiedienu lidz 1 bar!!! un ar vakum pistoli visas vakum trubas!!!!
                                man ļoti lēni ari turbina pumpē, varbūt turbīnas vaina???

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