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really high fuel pressures

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Funfettie

10+ Year Contributor
419
2
Sep 19, 2011
Menomonie, Wisconsin
Good evening, (sorry mods if this is in the wrong section)
I just started my year and a half build tonight and my fuel pressure wont go below 60+psi. I have a 255 walbro in tank, 255 in line, KCR 3000 micron filter, stock fuel rail, FIC 1550cc injectors, Fuel lab AFPR, with glowshit gauging mesuring the pressures. 6an braided lines from the tank to the afpr, stock return line. the afpr worked well before on e85, but after installing the second 255, i cant get it to go any lower. the set screw is backed all the way out and it wont go any lower. and ideas? also, could this be causing lean running and crappy idle? having issues with both during first starts.
thanks!
~`Funfettie`~
 
This is one of the oldest problems in the books.. i bet if you check the oldest page in any tech section you'll find a reference to it. I"ll let this be your treasure hunt for the nbight and if you have no luck by morning i'll re-state it for the 4 millionth, 200 thusandth 314th time in history LOL
 
Did you enlarge the siphon hole?

I have never heard of this... shit, im a newb... haha looks like i have a project tomorrow. Thanks guys!

This is one of the oldest problems in the books.. i bet if you check the oldest page in any tech section you'll find a reference to it. I"ll let this be your treasure hunt for the nbight and if you have no luck by morning i'll re-state it for the 4 millionth, 200 thusandth 314th time in history LOL

nope, didnt find anything... could you help me out? haha KIDDING :) i found lots on it, weird i had never heard of it.. looks like all the kool kids are doing it these days :thumb:
 
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