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Thread: how to detect a faulty fuel pump ??

  1. #1
    Guest StuartUK's Avatar
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    how to detect a faulty fuel pump ??

    Morning all,

    Could be nothing, but I got the feeling my fuel pump might be wanting to goto the after life!

    Had a Walbro fitted at 70k miles back in Feb 2008.....
    Am now at 139k miles, just had recent service/mot , but now the noise you can hear is almost like a high pitched whirring noise

    Car drives fine and so on, but I wonder, is that noise a sign that the pump is nearing its lifespan ? no idea how long these pumps are supposed to last ?

  2. #2
    Guest haz's s15R's Avatar
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    Wasn't much wrong with the car Monday night when you were nailing it towards asda by your house mate! Looked to be going well lol

  3. #3
    Guest StuartUK's Avatar
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    LOL !!
    Nailed it to 40mph, I remember that!! hehe !

  4. #4
    Guest immy21's Avatar
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    Hook a fuel pressure gauge between fuel filter and fuel rail.
    Check pressure at full boost, WOT though rev range up to limiter.

    If you still worried, see it as a service item and change it anyway.

  5. #5
    Guest StuartUK's Avatar
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    ok, cheers for input

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    next time you hear it getting louder unscrew the fuel filler cap.

    try taking the pump out and seeing if the sock is dirty/fallen off.

  7. #7
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    When checking the fuel pressure get a long hose on the T and cable tie the gauge to the wiper arm so you can see it while driving at high load.

    Bringing a temporary fuel line into the car isn't a very good idea.

  8. #8
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    If it has started to make noise, get a new one! A cheap investment compared to holes in your pistons.

  9. #9
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    My walbro's made a light buzzing whirring from day one, thought it was pretty normal for aftermarket fuel pumps to be heard.

  10. #10
    Guest StuartUK's Avatar
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    it always made a light whirring noise, but in past week or so, that whirring noise got louder!
    Although, after the car has been running a while, its not so noticeable, and when you turn off engine (say u goto the shops, etc), when you start up again, its not loud.....
    Just seems loud when the car hasn't been used for a while!

    Happy to get a new one, ebay probably best bet ?

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