Now with the great smell of petrol

Discussion in 'General Motoring' started by Bob Smith, May 27, 2004.

  1. Bob Smith

    Bob Smith Guest

    I have a vectra 2.0 16v R reg. Recently I have started noticing a smell of
    petrol if I have the fan on when I have been standing at traffic lights for
    10-20 seconds. This only happens when the engine is warm. I have had a
    look under the bonnet for a wet looking pipe, but cannot find one.

    Does anyone have a clue where the leak is?


    Bob Smith, May 27, 2004
  2. Bob Smith

    Clive Guest

    have a look at the rubber pipes that connect to the injectors
    try tightning them up as they crack on the inside.

    the reason you can see anything when its hot is because the fuel is
    evaporated straight away
    Clive, May 27, 2004
  3. Bob Smith

    Bob Smith Guest

    Would it be best to replace them if they were cracked? Or is that a test to
    see if they need replacing?
    I had a sniff around, and could smell nothing straight after driving it. I
    will try it with the engine running. Didn't really want to stick my head in
    there with petrol squirting about. (what psi is petrol pumped up to in the
    engine to inject it?)

    Bob Smith, May 28, 2004
  4. about 40 psi

    mrcheerful , May 28, 2004
  5. Bob Smith

    Ian Guest

    I had exactly the same thing with a Peugeot 205

    Going along fine, but come to a halt and the fumes were over powering!

    Turned out to be a split in a rubber hose from the fuel pump to the carb

    When going along the carb's demand for fuel matched the pump's output but
    when at idle the excess pressure was too much and it was spraying onto a hot

    I changed that pipe very soon afterwards!

    Ian, May 28, 2004
  6. Bob Smith

    Bob Smith Guest

    OK, had a look with the engine running, but the engine was cold. Did not
    see any hot 40psi jets of petrol death, so I stuck my head under, and there
    was no smell. I think I found a rubber pipe that feeds the injector rail
    (may be something else though) it has a metal part built onto the end of it,
    and is connected to the next bit with a nut. No squirts or wetness.

    All I could find is that the breather hose at the top of the engine was
    split (been cleaned that many times, the plier clip thing looks to have
    chewed it up), and a brown liquid has been evaporating off a little shelf
    below the front / bottom end of the pipe. I was going to replace this pipe
    anyway, cos it is soft and sticky on the inside

    So, could the split breather pipe be letting petrol smells out (definitely
    petrol, not oily smell), and does the "only when hot" back this up?


    Bob Smith, May 29, 2004
  7. Bob Smith

    Clive Guest

    it won't be the breather pipe
    tighten up all the clips on the injector rail. i use to have the sam problem
    on my senator where you could not really see anything most of the time.
    Clive, May 30, 2004
  8. Bob Smith

    Bob Smith Guest

    Filling up the other day, I noticed that the smell of petrol is slightly
    different from the smell I am getting. I now think the smell is a bit
    petroly, but exhausty too.

    I put some duct tape on the split pipe as a temporary measure while the new
    pipe arrives, and the smell seems to have reduced.

    I will have another look at the injector rail too.

    Bob Smith, May 30, 2004
  9. Bob Smith

    Vin Guest

    If internally cracked I find that tightening the clamp usually makes the
    leak worse. If you can prove the leak best replace the hose or, if there is
    sufficient slack, lop off a half inch from the end.

    If it's squirting about that much you should be able to spot the leak.

    Don't know the exact figure for your engine but enough to get you wet. The
    pressure can be held for a good while after the engine is last run. Some
    cars have a depressurisation valve but you would need to check your manual
    for that. If I need to break into an injection supply I pull the fuel pump
    fuse and then run the engine till it cuts.

    Vin, May 31, 2004
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