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rotorwrench · 10-04-2016, 06:34 PM

The 1948 F1 was the first to have the 8BA engine so you at least have the original type of engine. The 8BA/94 Holley carb has a power valve that can go bad. It is a similar type power valve to later model Holley carbs and can blow out if the engine back fires through the carb. It will leak raw fuel down the throat after a blow out. It could also be the float isn't shutting off properly or, as previously mentioned, is being overpowered by the fuel pump. The fuel pump pressure will work a 2.5 psi on these carb/engine combos. Much more and it can blow right through the float valve. A pump pressure check can verify that.

White smoke from the exhaust can also be coolant leaking from an engine block crack into the exhaust or a blown head gasket. It will come out as steam. I hope that your problem is all fuel related but be aware. Check your exhaust carefully and make sure there is no coolant in the oil pan. You would have to do a coolant system pressure test to make sure there are no leaks.

10-04-2016, 06:34 PM	#12
rotorwrench Senior Member Join Date: Jun 2010 Location: San Antonio, Texas Posts: 16,440	Re: distributor problrrm? The 1948 F1 was the first to have the 8BA engine so you at least have the original type of engine. The 8BA/94 Holley carb has a power valve that can go bad. It is a similar type power valve to later model Holley carbs and can blow out if the engine back fires through the carb. It will leak raw fuel down the throat after a blow out. It could also be the float isn't shutting off properly or, as previously mentioned, is being overpowered by the fuel pump. The fuel pump pressure will work a 2.5 psi on these carb/engine combos. Much more and it can blow right through the float valve. A pump pressure check can verify that. White smoke from the exhaust can also be coolant leaking from an engine block crack into the exhaust or a blown head gasket. It will come out as steam. I hope that your problem is all fuel related but be aware. Check your exhaust carefully and make sure there is no coolant in the oil pan. You would have to do a coolant system pressure test to make sure there are no leaks.