fuel pressure issues
#1
Staging Lane
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fuel pressure issues
drove my s10 347 for the first time this week. we originally set the pressure at 6 pounds. the fuel line runs up the goes to steal braid AN fittings, goes to the fuel log and the by-pass regulator then the extra fuel goes back to the tank through a hard line. but the pressure keeps jumping around on me. we went to start it the other night and had 2 pounds, thought that's weird. brought the pressure back to 6. went to start it tonight and the pressure was at 10. I'm lost . I have just the stock 2.2l pump in it, and I'm probably in the 450-500 fly wheel hp range. how can I figure if its the quick fuel by-pass regulator or the pump? the pump does seem really loud.
#3
I had about the same thing happen with me. it was the gauge under the hood getting hot from the engine and reading low . If I adjusted it back to 6 psi when it was hot and let it cool off by the next morning It would be high at the pressure gauge. I just adjusted it when it was cold to the correct pressure and called it good. I would check it from time to time when it was cold just after start up. My gauge was an oil filled .
Just something you may want to consider.
Just something you may want to consider.
#5
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Your lucky. I bought a new 280$ pump and 40$ regulator cuz of a liquid filled gauge... hopefully yours is fixed. I say everyone should put a gauge on it, set it, run it thru a full pull and watch the gauge to make sure it doesnt drop from lack of fuel, then replace the gauge with a plug. Good luck!
#7
I've been running a Holley Blue pump at the tank and a Holley pressure regulator on the fenderwell feeding a gauge and 4150 carb, same problem. I've read where the Holley regulators will fluctuate with temp changes. I bought a weaker fuel pump to try to fix this psi fluctuation. May end up with a different brand regulator.
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#8
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I've been running a Holley Blue pump at the tank and a Holley pressure regulator on the fenderwell feeding a gauge and 4150 carb, same problem. I've read where the Holley regulators will fluctuate with temp changes. I bought a weaker fuel pump to try to fix this psi fluctuation. May end up with a different brand regulator.
#9
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I may have been over working my pump but im running a 160 gph pump with 8 am lines to a deadhead quick fuel regulator. Not a single pressure issue after I switched to a dry gauge. Honestly I dont see why anyone would want a return style regulator after ive been running countless hours of hard driving without a single issue. Lots of idle time and lots of hard miles. Zero heat issues with the pump or fuel and zero pressure issues. Just my experience.
#10
I may have been over working my pump but im running a 160 gph pump with 8 am lines to a deadhead quick fuel regulator. Not a single pressure issue after I switched to a dry gauge. Honestly I dont see why anyone would want a return style regulator after ive been running countless hours of hard driving without a single issue. Lots of idle time and lots of hard miles. Zero heat issues with the pump or fuel and zero pressure issues. Just my experience.
#11
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Any long trips at cruising speeds? Hard drives are suckin the fuel, but a long slow trip may heat the pump up. I had issues deadheading a pump, would get hot on a longer drive and shut off. I just think it would be quieter and easier on the pump with a return. Just preference I guess