compression test and fuel pump relay

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  • zafra
    S2Forum Addict
    • Jun 2013
    • 320
    • Country: Spain

    #1

    compression test and fuel pump relay

    Hi, sorry for my english, im in my mobile and cant ask to google.
    Im doing a compression test,I do not want to inject fuel.only I have to remove the relay? I removed the 214
    Step 1: setup. <==
    Step 2: potentiation.
    Step 3: enjoy.
  • Laaf
    S2Forum Addict
    • Oct 2010
    • 275
    • Country: Finland

    #2
    You can pull the injector electrical plugs.

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

      #3
      Comprssion testing info

      Originally posted by Laaf
      You can pull the injector electrical plugs.
      Agree. This is one of the two best ways. The other is to pull the fuel injector power fuse. The 3rd way is to pull the fuel pump fuse (but that can still leave pressure in the fuel rail and the ECU will open the injectors as you crank the engine during the compression test).

      Here is a link to compression testing info for a AAN, ABY and/or ADU:

      The Audi Enthusiast website. Forums for all Audis including A4, S4, A5, S5, A6, S6, allroad, A8, S8, TT, R8, Q5, Q7, 4000, 100, 200, v6, v8, vintage, local forums
      RS2'd 93 UrS4 5 spd sedan
      94 UrS4 V8 6 spd manual avant

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      • AndyP
        S2Forum Zealot
        • Feb 2004
        • 6049
        • Country: England

        #4
        I just pull the 2 red motor fuses when I do mine.
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        1991 Audi S2 3B - 2.5 Stroker engine
        1997 A6 2.5TDi quattro avant - C4
        1976 RD250E / 350LC cafe racer

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