I have a LS motor with drag turbo with the vortech fmu and a walboro 255 high pressure. I got a fuel pressure gauge today to check my pressure, cause I figured if it was high, it would explain some of the problems I'm having. I checked it and saw 56 PSI AT IDLE!!!! Which, of course, is too high. What would cause it to be this high at idle? And how can I lower it, I don't have an AFC or anything like that. So what should I do? Thanks

 

what type of problems did you have

 

well, my air/fuel is going crazy and sometimes reading .5 to 1.4 volts instead of 0 to 1 volts. So, I think the high fuel pressure is causing my EGTs to go up causing the o2 sensor to mess up. I know the o2 sensor is ok, because it's the second one I've been through.

 

http://www.theoldone.com/articles/regulator/

 

i checked that out, i'm gonna do that for now. In the future I'll buy an adjustable FPR. Is the B&M makes good enough?

 

even with a B&M you have to do the bypass mod. I could not go below 46 psi with the 255 HP pump and B&M FPR.

 

really? Damn.