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Thread: Low Vacuum in 390
          
   
   

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  1. #4
    HWORRELL's Avatar
    HWORRELL is offline CHR Member Visit my Photo Gallery
    Join Date
    Oct 2003
    Location
    ST.LOUIS
    Car Year, Make, Model: 31 FORD 5 WINDOW,69 442, 305 sprint car,
    Posts
    1,410

    vacume to the modulator should be straight manifold vacume not carb venturi vacume. If thats correct I would measure vacume at the modulator end of the vacume line,maybe it has a leak in the line or it may be restricted.
    Last edited by HWORRELL; 11-05-2009 at 02:33 PM.

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