Car dies when given gas

Discussion in 'Technical' started by russellgaspard, Aug 16, 2014.

  1. russellgaspard

    russellgaspard Member

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    Ok Ive tried adjusting the screws on the carburetor and I cannot screw it in any further. I read on hot to make sure its adjusted correctly and they said to listen to the engine. it sounds like its idling good but every time I push the gas it tries to die. Can anyone help me diagnose the problem?
     
  2. Pintony

    Pintony Member

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    Sounds like your accelerator pump diaphragm is shot.
    Is it leaking fuel?
    If no fuel leak is found? Your discharge nozzle may be clogged.
     
  3. Mustangnut

    Mustangnut Member

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    Side note if you are able to screw in your air mixture screws all the way in and the car still runs you've got more issues then the pump shot diaphram
     
  4. Crazy Larry

    Crazy Larry Member

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    Bad accelerator pump or clogged fuel filter.
     
  5. russellgaspard

    russellgaspard Member

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    I did a rebuild on my carb and it runs now but it still idles slow unless I screw the air mixture screw all the way in. Also it backfired twice since I did the rebuild

    Note: I already made sure that the distributor isnt out 180 degrees
     
  6. Pintony

    Pintony Member

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    Backfire through the carb? It's running lean or still not getting enough fuel through the accelerator pump discharge nozzle. How much wear is on your pump cam?
     
  7. Mavman72

    Mavman72 Gone backwards but lookin' forward

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    You have a vacuum leak....If you turn the mixture screws in all the way and it still runs...Its sucking air where it shouldnt be. Check your vac hoses and carb base gaskets. (Squirt some water around the carb base)...If the engine stumbles...You have found your vacuum leak.
     
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  8. russellgaspard

    russellgaspard Member

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    well the emission system was taken out. what vacuum hoses need to be connected for a carter rbs?
     
  9. Pintony

    Pintony Member

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    I like Mavman72 answer about Vacuum leak.
    Not sure how the water thing will work???
     
    Last edited: Aug 18, 2014
  10. garrettmuir1227

    garrettmuir1227 (Almost) Certified to Work on Your Porsche

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    i usually use carb cleaner to search for vacuum leaks. you get an rpm increase instead of stumble. easier to notice IMO (that might just be because of the straight pipes though :evilsmile:)
     
  11. Mavman72

    Mavman72 Gone backwards but lookin' forward

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    I tend to use water or a non flammable spray carb cleaner...Flammable stuff will tell you real quick if you have a bad plug wire or Dist cap. LOL... Lost an eybrow once many moons ago. If the car is running straight, water will cause a quite noticeable hiccup/stumble...
     

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