| Holley fuel starvation? [message #307334] |
Sun, 18 September 2016 13:09  |
habbyguy
Messages: 896
Registered: May 2012
Location: Mesa, AZ
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I'm having an issue with my fuel system. I've had an issue on and off over the years, but I've got it acting pretty repeatable right now.
The coach has a Holley 64-7259 carb. It's got an auxiliary electric fuel pump (just replaced - the old one was clearly bad), and new fuel filter (inline, and at the carb). It does still have the mechanical fuel pump.
The symptom - with the auxiliary fuel pump turned off, if I go full throttle for 10 seconds, the engine will start sputtering and missing. Flip on the aux. fuel pump, and a second or two later, I've got full power again.
It's doing this with the fuel tanks plenty cool (been inside the warehouse, with the inside temperature around 70). It's warm outside, but hard to imagine I'm getting vapor lock (or is it?).
I thought this problem had been due to the old aux. fuel pump, which was not running when powered up, and it took a LOT of pressure to even blow air through it. But clearly there's still something going on.
The aux. fuel pump I bought was the Mr. Gasket pump (the only thing I could come up with ASAP at the time). Is it possible that it's not doing a good job of passing gas when it's not powered?
http://www.autozone.com/fuel-systems/fuel-pump/mr-gasket-fuel-pump/732035_0_0/?checkfit=true
... or does anyone else have any good ideas about what might be wrong?
Mark Hickey
Mesa, AZ
1978 Royale Center Kitchen
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