Me and my buddy are working on a 54 f800 fire truck and have just got the carb rebuilt. The weird thing is that when the motor is NOT running and I actuate the throttle the butterflies open, but when the engine IS running and i hit the throttle only the accelerator pump pumps fuel in the carb and the butterflies do not move? The engine will not rev because the butterflies arn't opening and I am guessing that the rebuilder did not set the Vacuum regulator right, so has anyone run into this problem?
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2005 F-350 XLT 4X4 Dually 6.0 Auto (Parents)
1991 HD F-250 XLT Lariat
Fire Breathing 460 V-8 E-4OD
RIP 94' F-150 4X2 5.0 MAF 4R70W Super Cab Shorty Green W/ tan accent 2" front lift Flowmaster 40 3-20-94 to 6-8-05 First truck and I hit a bridge reaching for the cellular
Try posting your question here: Ford Carburetor Forum. Carbs rule!!!! .
The local guru is Bill White. Your older Holley may be out of his range of expertise, maybe not.
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1946 1/2 ton with 305 cu in Y-block
1990 Ranger 4WD
I would check all your vacuum lines between your control unit and the governor. Sounds like your not getting air from the control valve, which is would keep your throttle closed when there's any manifold vacuum at all.
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54' Lincoln Y- Block Carb
