Golf MK1 choke issues when it's a warm day

Discussion in 'Carburettor' started by Volks42, Apr 13, 2022.

  1. Volks42 Forum Member

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    So weird issues. My golf has a pierburg 1B carb on it with the autochoke. It always had issues starting on a hot or cold day, if I didn't set the choke it'd idle really low or just die. Once warmed up it's okay.

    I figured maybe the ftarb was bad, so I removed it and rebuilt the carb and fitted new gaskets, jets, needles etc. After refitting and setting idle speeds and fuel mixture, she still won't stay running unless I set the autochoke, even on a lovely warm day!

    Is this "normal" or do I need to increase the idle speeds bypass screw? What else could cause these problems with it idling from "cold" on an otherwise lovely warm day?
     
  2. Megaross Forum Member

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    Even on a hot day your car will require some degree of choke until the engine is hot to create the right mixture.

    I've never owned a carburetted car that required zero choke to start (well) even in 30+ degree temps.
     
  3. Volks42 Forum Member

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    Ah okay! Just showing my inexperience with choked engines! Thanks for the reply!
     
  4. pigbladder Forum Addict

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    Location:
    cambridge , uk
    does sound normal...does it run well between first start and hot? no stalling or chugging /smoking?
     
  5. Volks42 Forum Member

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    It runs a little bit lumpy and has some white smoke, but I don't think it's the head gasket as it stops once warmed up.

    Drives lovely once warm, but I have noticed if I stop after a half hour drive, then try to start the car again half an hour later, while still warm it will struggle to start unless I give it loads of pedal and petrol into the carb. Yet to work out why, but it feels like it's starved of petrol when warm and trying to start again.
     

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