Mk2 pressure/return fuel pipe colours.

Discussion in 'Engines' started by Tristan, Aug 9, 2021.

  1. Tristan Paid Member Paid Member

    Joined:
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    Southern IRELAND
    Another question I've seen asked a few times, which is the fuel delivery pipe, and which is the return, on a mk2 gti.
    On this, untouched gti, black is pressure, from pump to engine. Blue is return, from the fuel pressure regulator.
     

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  2. Toyotec

    Toyotec CGTI Committee - Happy helper at large Admin

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    Jul 26, 2006
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    All VAG petrol cars. Blue is return to the tank, black is fuel supply.
     

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