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Inertia switch Fuel cut off switch

Discussion in 'Cavalier, Calibra, Vectra, Signum, Sintra & Insignia owners forum' started by davyboy3, May 5, 2009.

  1. davyboy3

    davyboy3 New Member

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    The other day my vectra 2.0 petrol 1998 would not start, having been good for years, engine turns great. National breakdown man put it down to faulty fuel pump gave it a whack with hammer on top of tank it worked for about 2 more starts.
    Anyway the pump works if connected directly to battery, the thing that baffles me is that there is power getting to the pump via its connection but it wont work. I have been told it could be the inertia switch but haven't a clue has to its whereabouts any idea's

    Many thanks dave
     
  2. rapala

    rapala Well-Known Member

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    Drives:
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    There isnt an inertia switch on your Vectra, you most likely have a problem with the fuel pump or its relay.
     
  3. davyboy3

    davyboy3 New Member

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    Oh Hmmm if i take the pump outand connect it to the battery it works perfectly, but hen i put it back it does not work. The connector shows positive signs of power but when i connect the pump back to it, it does not work

    WHY?

    Thanks for letting me know it ha no inertia switch
     
  4. davyboy3

    davyboy3 New Member

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    I have had a look at the Purple relay under the bonnet near the windscreen and all seems well there
     
  5. Dynamic Dave

    Dynamic Dave Qualified lego bricklayer

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    Try measuring the voltage at the terminals when the pump is connected. You may be seeing voltage there without it connected, but that could just be something like earth leakage. As soon as current is required, you'll be seeing no or little volts if it is something like earth leakage.

    Have you checked the fuses?
     
  6. davyboy3

    davyboy3 New Member

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    Thanks dave that makes sense. And no i haven't checked fuses as i assumed that with a reading they would be ok. Where are the fuses for the fuel pump? are they under steering wheel if so how do i know which one it is? ...cheers dave
     
  7. kingofthekerb

    kingofthekerb Well-Known Member

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    I'm betting on the fuel pump relay and the fuel injector relays (2 purple ones near windscreen) being at fault.

    Had a similar problem myself. Doubt it will be the fuses.
     
  8. Dynamic Dave

    Dynamic Dave Qualified lego bricklayer

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    The following link says it's fuse 19, 20 amp. However that's for the pre facelift. There is another fuse in position 19 of the facelift, but no mention of an alternate location for the fuel pump fuse.

    http://www.vauxhallownersnetwork.co.uk/showthread.php?p=1557305

    .
     
  9. davyboy3

    davyboy3 New Member

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    Cheers everyone it was the purple relay furthest from windscreen all sorted such a big problem turns out to be such a small one Again thanks very much
     
  10. kingofthekerb

    kingofthekerb Well-Known Member

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    Fuel pump relay, same fault i had.
     

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