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  • Earth Points

    Yo.

    My MK2 has a new ISV and MAF and now idles like it should!

    That said sometimes it still misbehaves and you can set it right by running the air conditioning.

    I just thought it was the added load on the engine that did it but a friend suggested it may have a dodgy earth.

    If so where do I check the earth points?

    I know there are the wires which connect to the rocker cover but are there any others?

    Anyone else had this issue?

    Cheers

  • #2
    yer ben

    There will be an earth that runs to the block, head and possibley gear box ( i have on mine but not sure if that was stock) there is also a main fuse box earth and other assiocated earths all crimped togther going into the earth terminal i assume.
    90 GTI Mk2 1.8t soon to be with GT28rs

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    • #3
      Also one up in the raintray to earth the ecu. That one is important and can be redone to good effect.
      sigpic Camden GTI Performance. VW / AUDI Specialists
      All Mechanical Work, Log book Servicing, New and used Parts and Imports
      19-20/6 Badgally Road, Campbelltown, 2560
      02 4627 3072 or 0423 051737 www.camdengti.com

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      • #4
        i've been meaning to redo some of my earths. what gauge cable should i use?

        the MFA oil temp reading jumps around when the electrics are switched on and off, thinking it's the ecu or fuse box earth.

        edit: just found this
        Last edited by joshyd-mk2gti; 14-09-2009, 11:39 PM.

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        • #5
          Cheers for the diagram!

          Yeah I must admit the headunit sometimes just turns off and the tacho will bouce up high when you turn the car on or off.

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          • #6
            So I got laughed at when I asked for the earth points to be checked my Auto Electrician. Not sure if I will go back.

            Anyway it now idles worse. The old italian bloke said he "adjusted it a little bit"

            Does anyone know if the ECU sends a higher idle signal to the motor when the A/C is on to account for the extra load?

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