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Thread: Done a self service but mpg has dropped!!

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    Regular Member Hendry02's Avatar
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    confused Done a self service but mpg has dropped!!

    I've recently carried out a self service on my signum 1.9cdti, it has an air lose problem somewhere near the alternator? Must be a cut hose or pipe??? What would be the easiest way to diagnose this as I can't seem to pin point it plus wouldthiss affect mpg? I was gettin 43-46 now I'm getting 29-31 ??

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    Regular Member Penfold101's Avatar
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    How do you know it's an air loss mate...?

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    Regular Member Hendry02's Avatar
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    It's mainly when I accelerate but can hear it more clear when I'm going through the tunnel. A rattle noise from idle gets louder and faster when I start the car, just noticed this

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    Regular Member byebyeitsagsi's Avatar
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    A rattle noise when your idling suggest DMF is on its way out and an air loss noise sounds like an air loss from one of your boost hoses or vacuum pipes.

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    Regular Member Hendry02's Avatar
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    Just sprayed up the belt off the alternator with wd40 to try and grease up the mechanism and it eased off the noise - can the cover easily be taken off the siide of the engine to be serviced up? ( sorry about the terminology, all new to me this)

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    Do I understand this correctly

    "you sprayed the belt with WD40"


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    Regular Member byebyeitsagsi's Avatar
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    Quote Originally Posted by MickAP View Post
    Do I understand this correctly

    "you sprayed the belt with WD40"

    My thoughts aswell

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    Regular Member Hendry02's Avatar
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    Sorry! Not the actual belt ha the wheel off the alternator.

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    Quote Originally Posted by MickAP View Post
    Do I understand this correctly

    "you sprayed the belt with WD40"

    What's wrong with that??

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    Quote Originally Posted by CritchvxD View Post
    What's wrong with that??
    WD-40 can eat some if not all rubber compounds if I remember right.

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