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Thread: holley 750 double pumper

  1. #1
    Moderator RACING JUNKIE Harbone's Avatar
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    Aug 2007
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    holley 750 double pumper

    I had a great working (old) holley 750 dp on my car that had some fuel bowl srews stripped out so I decided to install a Proform center body. I put all new parts (needles, floats, gaskets, squirters, etc.) and cleaned everything else. I installed the carb and now I cannot get it to idle? It will run at about 1500 rpm and rev up fine but as soon as I start backing down the idle screw it dies like there no gas going thru the idle circuit. any suggestions?

    As close to "Normal" as I can get...

  2. #2
    Senior Member DYNO OPERATOR
    Join Date
    Feb 2009
    Probably still has crap in the orfices fromthe machining process.

  3. #3
    Senior Member RACING JUNKIE
    Join Date
    Mar 2006

    I have only had that symptom once when there was a piece of gasket material(very small) stuck inside the needle & seat assmbly. It had a high weak idle like you explained. Good luck Brutha!!! Scoot
    "I would walk through hell on Sunday before I fear the enemy"

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