more Holley 1904 issues
#1
more Holley 1904 issues
carb pukes gas out of over flow and mostly drips out of hole where the butterfly linkage goes into body of carb after shut down-not everytime, but probabaly 80%, and yesterday it died at stop sign and was dumping gas, tapped on carb and held throttle wide open and started and ran fine on way home, then on shutdown was spilling gas again. almost like a stuck float? any ideas?
#3
#4
#5
That's the wackiest thing I've heard in a while. If the filter is empty, how could fuel pressure be the culprit? Could the gas be boiling in the carb?
#6
does sounds crazy, I guess it is sucking up the fuel from the filter and leaking it out of carb on shutdown?
I really have no idea
thats a possibility, but truck has NEVER been over 180 with me in it and runs at 155 pretty much all the time...closer to 150 with all the hoses changed and all new coolant
I really have no idea
thats a possibility, but truck has NEVER been over 180 with me in it and runs at 155 pretty much all the time...closer to 150 with all the hoses changed and all new coolant
Last edited by Maltman; 03-13-2014 at 03:45 PM. Reason: added info
#7
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#8
I know the flat head you are talking about, this carb was rebuilt a few months ago. I will check and tighten if loose. but, wouldn't it leak all the time if that was loose?
thanks for the replies!
thanks for the replies!
#9
BTW the boiling point of gasoline is between 100-400 Fahrenheit. If its boiling in the carb it might be pushing the liquid out of the carb and back to the tank simultaneously. Just a thought...
#10
Yes sir, those are the issues I'm having. Now just how to fix her, would hate for a fire to develop from gas dripping on exhaust manifold. Thanks again for the replies and any and all thoughts of how to fix would be much appreciated.
I'm thinking more and more about the boiling gas in carb, is this a known issue?
I'm thinking more and more about the boiling gas in carb, is this a known issue?
#12
IF the problem is percolating that's caused by excessive heat to the base of the carb.
1: do you have a gasket pack between the carb and manifold?
2: The heat riser in the exhaust manifold could be stuck in the closed position or broken internally and be in the closed position. If that occurs it directs exhaust gasses to the bottom of the intake manifold and over heats it and will transfer the heat to the carb.
1: do you have a gasket pack between the carb and manifold?
2: The heat riser in the exhaust manifold could be stuck in the closed position or broken internally and be in the closed position. If that occurs it directs exhaust gasses to the bottom of the intake manifold and over heats it and will transfer the heat to the carb.
#13
#14
Something else I have seen is the fuel in the fuel line is vaporizing & forcing the fuel up toward the carb. I just looked at the pics in your garage & see the fuel line goes from the pump all the way around the front of the engine & then back to the carb, right behind the radiator & then above the exhaust manifold. It may be picking up heat during this trip.
Try to insulate this line with something & see if it helps. I have used over-sized fuel line split open & secured with tie wraps.
Try to insulate this line with something & see if it helps. I have used over-sized fuel line split open & secured with tie wraps.
#15
just noticed people talking about this same thing while reading on percolation, will do. Thanks!
Joe
Joe
Something else I have seen is the fuel in the fuel line is vaporizing & forcing the fuel up toward the carb. I just looked at the pics in your garage & see the fuel line goes from the pump all the way around the front of the engine & then back to the carb, right behind the radiator & then above the exhaust manifold. It may be picking up heat during this trip.
Try to insulate this line with something & see if it helps. I have used over-sized fuel line split open & secured with tie wraps.
Try to insulate this line with something & see if it helps. I have used over-sized fuel line split open & secured with tie wraps.