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Discussion in '1969-1972 K5 Blazer | Truck | Suburban' started by ZAC, Aug 31, 2002.

  1. ZAC

    ZAC Newbie

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    I HAVE A 72 BLAZER WITH A 350 AND WHEN SHE IS WARM I HAVE TROUBLE SHUTING HER DOWN. WHAT COULD BE THE PROBLEM?
     
  2. jeffro

    jeffro 1/2 ton status

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    Ignition timing. Poorly adjusted carb. Low octane gas.
     
  3. NoSmog73

    NoSmog73 1/2 ton status

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    It will be your timing just adjust it and alll will be better....mike
     
  4. 1HIHUM

    1HIHUM 1/2 ton status

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    Mine does the same thing. I have to give the throttle a quick stab every time I shut it down to lower the idle before shutting it off or it dieseles. /forums/images/icons/frown.gif I tried adjusting the timing down but it didn't help. /forums/images/icons/mad.gif The motor is a ZZ4 with a holley 750 vacuum secondary carb.I also rum premium gas so I rulled that out as well. /forums/images/icons/confused.gif Any other suggestions fellas. I'd like to fix that little gremlin too /forums/images/icons/grin.gif
     
  5. NoSmog73

    NoSmog73 1/2 ton status

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    </font><blockquote><font class="small">In reply to:</font><hr />
    I have to give the throttle a quick stab every time I shut it down to lower the idle before shutting it off or it dieseles. I tried adjusting the timing down but it didn't help.

    [/ QUOTE ]

    Try adjusting your fast idle speed down , then reset your idle to about 650 rpm's in gear just turn the idle then put it in gear till you get the 650 , then reset the timing with the right idle speed it should go away...
     

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