Not Ranked
Fuel pressure to high?
Bludog what is the fuel pressure you are running? How where the floats setup on the carb? Cold motor or hot? You have no picture of the top of the 750 carb, do you have the 2 vent tubes in the top? If the level for the floats are high the gas will suck out of the vents at idle or high vacuum in the motor. Power valve does not have alot to do with the idle curcuits. If you have a propane torch and get the car running at ilde, hook a hose to the end of the torch and use a small end on the hose like a tire inflator and run this around the base of the carb. If the idle of the motor or the motor smooths out, you have a leak. Check your PCV valve for working correctly too. You don't need to run more than 5 1/2 pounds, of fuel pressure and the gauge on the fuel rail maynot be that accurate either. Holley needle and seats bounce with any more that 6 psi pressure and this may cause you a idling problem. Try backing off the pressure to 5 psi and set the carb floats up hot with the motor off and the fuel pump running. MAKE SURE you have rags to catch the fuel or the clear site glass plugs for check the fuel level. If you don't have clear site plugs for the carb, get a set before you do any adjustments. Without a choke, and if it is cold out you will have cold start problems. If the carb is a double pump, double feed, Pump once to the floor and it should start. Pump pedal twice if the carb is a single pump. If your fuel pump is on a switch, Turn on to get pressure and fill carb, then shut off until car is running. This will keep the flooding to a minimum and washing down of the cylinders on cold starts. Rick L.
|