G40/pc178 Sensor

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  • malncol
    S2Forum Addict
    • Mar 2012
    • 288
    • Country: Australia

    #1

    G40/pc178 Sensor

    Will this sensor fit my aan http://www.ebay.com.au/itm/291041848...%3AMEBIDX%3AIT
    also where can i get a crank sensor as i have my spares here in australia
    thanks
    mal
  • UrS4boy
    S2Forum Obsessed
    • Feb 2006
    • 11859
    • Country: Canada

    #2
    G40 Cam Sensor Replacement DIY pdfs

    Why do you think you need a crank sensor? There is always a G28 Crank Sensor (is bad) code when you pull the codes with the engine stopped.

    As for the cam sensor, the ebay link seems to be a correct AAN/ABY/ADU cranksensor, at least based on the bracket PN (034905161) in the photo and the general shape of the Hall sender that they show. The 3 pin plug also looks correct.

    All that said, for US$15 and shipping (airmail, small packet) you could purchase just the Hall sender from EFI Express:

    EFI Motorsport is a company dedicated to providing quality upgrade parts, hardware, software, tuning, and service for a range of European vehicles.


    To install it you would follow this DIY by Nate Persing:



    Also available as a pdf: http://12v.org/urs/NatePs_ImQuattros...tProcedure.pdf

    RS2'd 93 UrS4 5 spd sedan
    94 UrS4 V8 6 spd manual avant

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    • malncol
      S2Forum Addict
      • Mar 2012
      • 288
      • Country: Australia

      #3
      At the moment there is nothing wrong with the car ,iam just getting some spares for the rally car .I know you can just buy the hall sensor on its own but ill get a complete one as a spare and prob a spare sensor as well , the crank one hopefully wont be as expencive
      thanks
      mal

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      • UrS4boy
        S2Forum Obsessed
        • Feb 2006
        • 11859
        • Country: Canada

        #4
        G4 and G28 Info and Maintenance

        Originally posted by malncol
        At the moment there is nothing wrong with the car ,iam just getting some spares for the rally car .I know you can just buy the hall sensor on its own but ill get a complete one as a spare and prob a spare sensor as well , the crank one hopefully wont be as expensive thanks mal
        Again, why do you think you need a crank sensor? G4 = crank position, G28 = crank/engine speed. Neither fails very often because they are basically wire coils inside metal cans, no moving parts.

        G4 and G28 info: http://forums.quattroworld.com/s4s6/msgs/20986.phtml

        G4 = 034905381 (black) http://www.ecstuning.com/Search/Site...5381/ES273566/

        G28 = 034905381A (grey) http://www.jimellisaudiparts.com/pro...34905381A.html
        Last edited by UrS4boy; 30 June 2015, 17:39.
        RS2'd 93 UrS4 5 spd sedan
        94 UrS4 V8 6 spd manual avant

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        • malncol
          S2Forum Addict
          • Mar 2012
          • 288
          • Country: Australia

          #5
          good point ill have to check if mine is G4 or G28 as mine only runs the one sensor there for the motec .I know they are near bullet proof but if i have a spare then it wont break
          thanks
          mal

          Comment

          • UrS4boy
            S2Forum Obsessed
            • Feb 2006
            • 11859
            • Country: Canada

            #6
            Originally posted by malncol
            good point ill have to check if mine is G4 or G28 as mine only runs the one sensor there for the motec .I know they are near bullet proof but if i have a spare then it wont break thanks mal
            When you figure it out, I will probably have a good anti-failure paranoia suggestion for you.
            RS2'd 93 UrS4 5 spd sedan
            94 UrS4 V8 6 spd manual avant

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