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Thread: Vacuum in fuel tank.

  1. #11
    Join Date
    Feb 2010
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    Out of curiosity, there is a difference in the Gems and Thor fuel systems too, in that (and don’t quote me on this) the Gems run a return line from the fuel rail and the Thor don’t (could be ass about there). I wonder if this plays a part? Mine have all been Thor, and all had vacuum to some degree when opening the cap.

    Cheers
    Keithy

    2002 P38 Range Rover HSE

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  2. #12
    Join Date
    Feb 2013
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    Gosford, NSW, Australia
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    Quote Originally Posted by Keithy P38 View Post
    Out of curiosity, there is a difference in the Gems and Thor fuel systems too, in that (and don’t quote me on this) the Gems run a return line from the fuel rail and the Thor don’t (could be ass about there). I wonder if this plays a part? Mine have all been Thor, and all had vacuum to some degree when opening the cap.

    Cheers
    Keithy
    Mate

    You are correct, the GEMS system runs a continuous loop of fuel from the tank to the injectors and back again, the THOR system uses a single feed with a pressure relief valve in the pump

    Not sure if that accounts for the vacuum but it may well do so !

    Steve

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