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vapour lock?

Discussion in 'Fuel System & Electrics' started by type82e, Feb 8, 2009.

  1. type82e

    type82e New Member

    Messages:
    66
    Location:
    casino
    ive been having some problems with my 74 1800 kombi
    after stopping somewhere when its warm it refuses to start again sometimes
    when it cools down again its fine, as I'm wanting to go to dubs by the pie place i dont want to be stuck in the boondal carpark with a kombi that wont start
    any ideas on starting a hot kombi?
    leave engine idling for a while after stopping?
    marcel
     
  2. ttmck

    ttmck Super Moderator Staff Member

    Messages:
    2,737
    Location:
    Hallett Cove STH AUS
    I would say you have the need for a carburettor o/haul
    eg float level too high . Chokes coming on when the engine is hot you may have fuel pump issues too perhaps too much pressure if you have an electric pump
    It helps to hold the throttle wide open when starting when this happens but its not the fix , the fix is mentioned above
     
  3. gazman

    gazman Well-Known Member

    Messages:
    1,821
    Location:
    Perth WA
    I read somewhere that this was the recommended procedure from VW for starting a hot motor.... whether your kombi has carby related probs or not this method should get you going again.(assuming it IS vapour lock)
     
  4. cammokombi

    cammokombi New Member

    Messages:
    1,562
    Location:
    Melbourne Victoria
    Been there done that

    Hi, I can relate to your problem. I was getting vapour issues when I was out in the desert east of Alice springs. The solution was to move any fuel lines away from the engine block and to fit an electric fuel pump to pressurize the lines. Ive never had that problem recure sinse.
    regards, cammo.
     
  5. type82e

    type82e New Member

    Messages:
    66
    Location:
    casino
    just an update on this I took it to a mechanic for a tune up just before dubs by the pie and he discovered very low comprssion on no. 3 cylinder
    so I was given the day off today and I ripped out the motor and its now at the mechanics.
    no.3 exhaust valve was recesessed right into the head so theyre going to JAX in the morning
    hopefully its not going to cost an arm and a leg
    marcel
     
  6. Buddy

    Buddy New Member

    Messages:
    39
    Location:
    Melbourne
    Try putting aluminium foil around all fuel lines. It is ugly but helps.
    I also find getting plastic shroud/scoop (use perspex) on the existing external air vents, helps to get a little extra air.

    Oh yeah and a electric fuel pump is a good idea.
     
  7. type82e

    type82e New Member

    Messages:
    66
    Location:
    casino
    well hopefully the rebuilt engine will run a lot cooler I'll renew all the fuel lines, filters etc and have the carbs tuned but if that doesnt cure it an electric pump will go in
    marcel
     

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