Idle problems with vems

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  • nip
    S2Forum Extremist
    • Apr 2006
    • 1786
    • Home: United Kingdom Current: Abu Dhabi

    #1

    Idle problems with vems

    Evening all it started a few weeks ago it's started to rev at about 1000-1150, I've pressure tested the bottom of turbo back to the inlet no leaks what so ever all vacume lines tested , I've changed the isv air temp Sensor even the water sender on the back of the head .
    Tonight I changed the Tps and it started to rev at 1400-1500 rpm I've logged it on vems idle should be at 850 but for some reason it's too high any ideas would be much appreciated
  • blackS2
    S2Forum Addict
    • Apr 2010
    • 455
    • Country: Germany

    #2
    Originally posted by nip
    Evening all it started a few weeks ago it's started to rev at about 1000-1150, I've pressure tested the bottom of turbo back to the inlet no leaks what so ever all vacume lines tested , I've changed the isv air temp Sensor even the water sender on the back of the head .
    Tonight I changed the Tps and it started to rev at 1400-1500 rpm I've logged it on vems idle should be at 850 but for some reason it's too high any ideas would be much appreciated
    without the log its difficult to guess...
    [__]=oooo=[__]

    Comment

    • popdemonic
      S2Forum Extremist
      • Dec 2007
      • 1304
      • Country: Thailand

      #3
      have you calibrated the TPS after installed the new one?
      have you downloaded the patch files for CLT and IAT sensor?
      send us some logs and we can see what's wrong with the configs or Hardware problems.
      one of a few I5 from Asia.

      Comment

      • nip
        S2Forum Extremist
        • Apr 2006
        • 1786
        • Home: United Kingdom Current: Abu Dhabi

        #4
        I can send the log if you like, I have shown a few people and they say the logs are ok nothing to show the problem

        Comment

        • popdemonic
          S2Forum Extremist
          • Dec 2007
          • 1304
          • Country: Thailand

          #5
          pm'd
          one of a few I5 from Asia.

          Comment

          • jade
            S2Forum Extremist
            • Jan 2005
            • 1811
            • Home: New Zealand Current: Spain

            #6
            Originally posted by nip
            I can send the log if you like, I have shown a few people and they say the logs are ok nothing to show the problem
            I would check the ISV is moving freely, and that you car feel it working, vibrating double check I know you said you replaced it but worth a look


            If you do not post a log cannot help much, need to have a look at your config
            RS 2 580HP

            Comment

            • popdemonic
              S2Forum Extremist
              • Dec 2007
              • 1304
              • Country: Thailand

              #7
              yeah the isv is occasionally stuck open or some dirt caused the valve couldn't be responded or moved freely.
              i would tried to spray or soaked it with carb cleaner.
              one of a few I5 from Asia.

              Comment

              • nip
                S2Forum Extremist
                • Apr 2006
                • 1786
                • Home: United Kingdom Current: Abu Dhabi

                #8
                Originally posted by jade
                I would check the ISV is moving freely, and that you car feel it working, vibrating double check I know you said you replaced it but worth a look


                If you do not post a log cannot help much, need to have a look at your config
                I have checked it even with another's isv they both are the same

                Comment

                • nip
                  S2Forum Extremist
                  • Apr 2006
                  • 1786
                  • Home: United Kingdom Current: Abu Dhabi

                  #9
                  Originally posted by popdemonic
                  yeah the isv is occasionally stuck open or some dirt caused the valve couldn't be responded or moved freely.
                  i would tried to spray or soaked it with carb cleaner.
                  I will try to recalibrate bathe Tps tomorrow

                  Comment

                  • jade
                    S2Forum Extremist
                    • Jan 2005
                    • 1811
                    • Home: New Zealand Current: Spain

                    #10
                    Originally posted by nip
                    I have checked it even with another's isv they both are the same
                    If you hold it you can feel it vibrating when the engine is running, that will show its working
                    RS 2 580HP

                    Comment

                    • quattro-nick
                      S2Forum Extremist
                      • Sep 2012
                      • 1746
                      • Country: Belgium

                      #11
                      you can look for airleaks with some spray brake cleaner or try ignition based idle control in vems.
                      audi coupe quattro b2 2.2 20vt project (573hp-626nm)
                      TWINCHARGED power,zero lag
                      AEM W/M injection

                      Comment

                      • nip
                        S2Forum Extremist
                        • Apr 2006
                        • 1786
                        • Home: United Kingdom Current: Abu Dhabi

                        #12
                        Originally posted by jade
                        If you hold it you can feel it vibrating when the engine is running, that will show its working
                        Cheers jade I have done that seem ok

                        Comment

                        • nip
                          S2Forum Extremist
                          • Apr 2006
                          • 1786
                          • Home: United Kingdom Current: Abu Dhabi

                          #13
                          Originally posted by quattro-nick
                          you can look for airleaks with some spray brake cleaner or try ignition based idle control in vems.
                          I have tried all hoses checked and pressure tested

                          Comment

                          • nip
                            S2Forum Extremist
                            • Apr 2006
                            • 1786
                            • Home: United Kingdom Current: Abu Dhabi

                            #14
                            also I started it up drove about half a mile put my foot down no boost!!!! turned the car off then back on again and full boost back to normal

                            Comment

                            • newsh
                              S2Forum Obsessed
                              • Aug 2003
                              • 16226
                              • Country: United Kingdom

                              #15
                              MAF connector

                              S2 Coupe 3B Project


                              Ur quattro restoration

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