Carb problems

Discussion in 'Technical' started by Kenter, Jul 6, 2011.

  1. Kenter

    Kenter New Member

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    Hello all I have a 71 Mav with the 170Cu In6 with the carter yf carb. I can't get the carb to adjust. It will idle and run fine if I plug the end of the PCV valve with my finger. What is wrong here? I need help bad this is my daily driver and I don't have any other means of getting to work.
     
    Kenter, Jul 6, 2011
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  2. Joe Dirt

    Joe Dirt BBF life

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    Sounds like you got a vac leak
     
    Joe Dirt, Jul 6, 2011
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  3. Kenter

    Kenter New Member

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    Is there some sort of diagram somewhere that will help me diagnose it?
     
    Kenter, Jul 6, 2011
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  4. Bob Wiken

    Bob Wiken Chronologically Gifted

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    Mkae sure all the vacuum ports on your carb are hooked to something or pluged.
     
    Bob Wiken, Jul 6, 2011
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  5. whitey68

    whitey68 Member

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    check your pcv hose and maybe the base gasket.
     
    whitey68, Jul 6, 2011
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  6. Earl Branham

    Earl Branham Certified Old Fart

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    With everything hooked up, spray some carb cleaner around the base of the carb and the the hoses. If the engine revs up, there is a vacuum leak at that point.
     
    Earl Branham, Jul 6, 2011
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  7. Kenter

    Kenter New Member

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    Alright so I got someone to run it while I was spraying carb cleaner around it. No spot in particular made it idle up. So I took a breather and decided to play around with the PCV some more. It passed the rattle test, I also tried to blow through it and suck to test whether it seals it passed. I thought just out of a moment of brilliance to swap it out with another from a different engine. I took it from my 88 parts BroncoII and it started to work just fine. Thanks for all your guys help! I'm so glad I got this figured out to go to work tomorrow.:thumbs2:
     
    Kenter, Jul 7, 2011
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