Old 06-09-2012, 05:24 AM
Senior Member
Join Date: Aug 2007
Location: Iowa - USA
Posts: 218
Default olley black pump and holley 704 regulator

I put the above combo on my sbc. When the engine is running, the regulator does its job of limiting pressure to 6-7 lbs. However when the engine is off and the pump is on, it will not hold the pressure to 6-7 lbs but goes up to the max of the pump -14 lbs. This causes fuel to leak out of the carb. Somewhere I read that the black pump has an external bypass port. Not on mine. At least I can't find anything but in and out. The regulator has 2 output ports, 1 is plugged, the other goes to the fuel log. Should I unplug the plugged port and run it back to the fuel tank? I really don't want to buy another pump. Any help would be appreciated.
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