Low fuel pressure (LS1 RT255)
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@DaBrute Mine's returnless also (Stock-ish setup. Just Ractronics pump, FAST Rails and 42# injectors) I don't know much about your setup, but every car is different. Check a message board to see what it should be. I have to run a return now and an Aeromotive regulator to correct it. You can run more of a "pure" and "true" tune with the correct fuel pressure. It can make a big difference!
35057 2 weeks ago
@35057 i have a mustang, i'm usually at ~28# at idle and 40 - 45# at wot, i dont know much about fuel systems but i'm guessing its because im returnless
DaBrute 2 weeks ago
@DaBrute What car? 55 is low for an LS*. should be 60 at idle and no lower than maybe 58 at WOT. It runs ~45# at WOT now. Gotta run a whole new delivery system. Gonna have to run a return from an aftermarket regulator. The last hack to tune it took it out of the tune instead of fixing the fuel problem.
35057 3 weeks ago