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bad acceleration

  1. Fluttery acceleration from idle to 1300-1500rpm

    I have a 390fe that's completely stock minus an HEI distributor and a 4 barrel intake and holley carb. With my basic 600cfm carburetor, a problem arose where the acceleration from idling around 700 rpm to about 1500 rpm was real fluttery and loud, and really weak. After 1500 rpm, it would...