Testing MAF

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  • valjo
    S2Forum Extremist
    • Aug 2003
    • 1110
    • Country: Latvia

    #1

    Testing MAF

    Hi!

    i have tested mine MAF today. I take test like there stands: http://s2central.net/ds_G70.html

    And i get quite low voltage outputs:
    -ignition on, engine off caa 1.1v
    -idle caa 1.7v
    -full throttle for quick time max caa 2.8v
    Has anyone there make such test recently so we should compare voltage outputs.
    i know that according to mine outputs i could change maf but i would like to be 100% sure!

    thanks!
    Audi Coupe S2 1993
    Audi V8 4.2 1993
    Audi cabrio 1998
  • valjo
    S2Forum Extremist
    • Aug 2003
    • 1110
    • Country: Latvia

    #2
    anyone?
    Audi Coupe S2 1993
    Audi V8 4.2 1993
    Audi cabrio 1998

    Comment

    • 4WheelDrifter
      S2Forum Zealot
      • Oct 2004
      • 5773
      • Country: Devon

      #3
      Those values sound a little low. Have you not got another MAF you can try?
      SS

      Comment

      • valjo
        S2Forum Extremist
        • Aug 2003
        • 1110
        • Country: Latvia

        #4
        Originally posted by 4WheelDrifter
        Those values sound a little low. Have you not got another MAF you can try?
        hi stu!

        i tried another one today but it is old too, with lower voltages....
        i will buy new one from vagparts very soon
        Audi Coupe S2 1993
        Audi V8 4.2 1993
        Audi cabrio 1998

        Comment

        • 4WheelDrifter
          S2Forum Zealot
          • Oct 2004
          • 5773
          • Country: Devon

          #5
          Is there anyone out there with a new(ish) that fancies doing the s2central MAF test?
          SS

          Comment

          • s2_bo
            S2Forum Zealot
            • Oct 2005
            • 6067
            • Home: United Kingdom Current: France

            #6
            Originally posted by valjo
            hi stu!

            i tried another one today but it is old too, with lower voltages....
            i will buy new one from vagparts very soon
            Not trying to steel business from Vag parts here but check this thread out first, might be cheaper:
            91 S2 coupé - RIP
            98 S8 - Luxury barge

            Comment

            • S2central.net
              Retired OG Mod
              • Jul 2003
              • 16590
              • Country: Northern Ireland

              #7
              Valjo - your figures do sound low indeed according to that test which I found in the AAN/ABY diagnostic manuals. I can test mine again at the weekend for comparison - hopefully others can too.
              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

              • valjo
                S2Forum Extremist
                • Aug 2003
                • 1110
                • Country: Latvia

                #8
                @paul: i know that are quite low.....
                it would be nice if you could test yours to compare voltage!
                Audi Coupe S2 1993
                Audi V8 4.2 1993
                Audi cabrio 1998

                Comment

                • Pirvu Eugen
                  S2Forum Extremist
                  • Apr 2007
                  • 1978
                  • Country: Romania

                  #9
                  I have also same small readings! I have bad MAF?
                  I am curious!

                  Comment

                  • valjo
                    S2Forum Extremist
                    • Aug 2003
                    • 1110
                    • Country: Latvia

                    #10
                    Originally posted by Pirvu Eugen
                    I have also same small readings! I have bad MAF?
                    I am curious!
                    what readings do you get?
                    Audi Coupe S2 1993
                    Audi V8 4.2 1993
                    Audi cabrio 1998

                    Comment

                    • Pirvu Eugen
                      S2Forum Extremist
                      • Apr 2007
                      • 1978
                      • Country: Romania

                      #11
                      engine off, ignition on 1.2V, idling 1.7V and short full throttle ~2.6V and still no boost cut out like the majority off the MAF sensor failure. The burn off is ok also.
                      Not sure what is the problem. Hope we get an answer.
                      All the best!

                      Comment

                      • GeorgeS2UK
                        S2Forum Addict
                        • Oct 2004
                        • 225
                        • Home: England

                        #12
                        MAF test

                        Originally posted by valjo
                        what readings do you get?
                        Eng Off - 1.4v
                        Eng Idle - 2.7v
                        Throttle open 3v - 4.7v
                        Burn off test - OK

                        But I still have an Idle problem, and still cant track it down,

                        Guess its not the MAF though
                        91 S2 3B in Pearl, Miltek, De-Cat pipes, Short Shifter, 996 Monoblocks + 323 A8 Discs, Whiteline R-ARB:MRC Generic 3B Chips
                        .

                        Comment

                        • Pirvu Eugen
                          S2Forum Extremist
                          • Apr 2007
                          • 1978
                          • Country: Romania

                          #13
                          what multimeter you use? should be faster reading? or i have bad MAF? i dont have new one and is very expensive only for a test.
                          Thanks!

                          Comment

                          • valjo
                            S2Forum Extremist
                            • Aug 2003
                            • 1110
                            • Country: Latvia

                            #14
                            Originally posted by GeorgeS2UK
                            Eng Off - 1.4v
                            Eng Idle - 2.7v
                            Throttle open 3v - 4.7v
                            Burn off test - OK

                            But I still have an Idle problem, and still cant track it down,

                            Guess its not the MAF though
                            thanks for that infos! Are you running stock s2?

                            btw for idle problem try cleaning ISV, check lambda, POT/idle switch .....
                            Audi Coupe S2 1993
                            Audi V8 4.2 1993
                            Audi cabrio 1998

                            Comment

                            • GeorgeS2UK
                              S2Forum Addict
                              • Oct 2004
                              • 225
                              • Home: England

                              #15
                              Originally posted by valjo
                              thanks for that infos! Are you running stock s2?

                              btw for idle problem try cleaning ISV, check lambda, POT/idle switch .....
                              Stock + Milteck Exhaust and MRC Generic Chip (3B)
                              91 S2 3B in Pearl, Miltek, De-Cat pipes, Short Shifter, 996 Monoblocks + 323 A8 Discs, Whiteline R-ARB:MRC Generic 3B Chips
                              .

                              Comment

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