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Fuel line connections at engine bay [Mk4 GTI]

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  • Fuel line connections at engine bay [Mk4 GTI]

    Hey guys, first post here - bit of a VW noob, so sorry if my question is a bit silly. I tried searching first!

    Basically, I'm wondering if anyone could fill me in on which fuel line goes to which connector at the engine bay of a Mk4 GTI 1.8t.


    After having my timing belt and water pump done, I started getting a in intermittent leak at the fuel filler cap (and a 'whoosh' noise when the cap is open.

    I checked the fuel pump etc and it all seems fine, so I went and did some more research online.

    I found a couple of threads on some forums where people said their fuel supply/return lines had been mixed up, causing similar problems.

    The posts I read said the fuel lines should match up to the corresponding clip colour on the connections (black, blue & white).


    So, I checked the engine bay earlier and noticed the white line had the blue-clip connector on it, and the blue hose had the white-clip connector on it.

    This is what they looked like:


    I swapped them over, so the white line now has the white-clip connector on it, and the blue line has the blue-clip connector on it.

    This is what they look like now:



    I'm a bit concerned that I should have left them how they were, and I can't seem to find any concrete info to suggest if I was right or wrong.


    Anyone have advice for me?


    Cheers,
    Oliver
    Attached Files
    2003 Golf GTI 1.8t
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