1badasZ

is it possible for an adjustable fuel regulator to go bad? i have the accel regulator and no matter which way i turn it lately it doesnt go up. unless its maxed out or something. does anyone know the adjustment range of it

GreenDemon

Of course. Some people have had issues with those as well. You should be able to turn it up to at least 60, assuming pump and filter are in good condition, no leaks. If you can't fix it try talking to Accel and see if you can get a free replacement.

Injuneer

The AFPR works by closing down the fuel return flow back to the tank. Simply pinch the return line to block off flow, and the pressure should rise to the shutoff pressure of the pump, in excess of 60psi. If blocking the return line raises the pressure, but the AFPR can't do the same, the AFPR is faulty. If you get the same pressure by blocking off the return line that your AFPR max's out at, you have a weak fuel pump, or the diaphragm on the AFPR is allowing fuel to flow into the vacuum compensation line. Pull the vacuum line off and look/smell for raw fuel.

96capricemgr

The adjustables are MUCH more failure prone than stockers, one brand in particular(not Accel) you could about expect to blow in a week

1badasZ

and what brand is that so i can make sure i stay away from it lol. imma replace the pump with a racetronix cause i need a bigger one anyway and if that doesnt fix my problem then im gonna try another regulator

mojorisin

does anyone know what the numbers and or letters on the accel AFPR mean? also, does anyone have an under the hood fuel pressure gauge that is permanent?

Z95m6

The power was down big time on my Z and a new fuel pump fixed it. I never actually checked the pressure but the car only put down 320 rwhp on the dyno and fell on its face about 5k rpm. The stock pump also had 140k on it and was drawing my volt gauge all the way down to 12.5. I just went with a new Racetronix pump and harness now its a beast all over again.

96capricemgr

The Aeromotive were the REALLY bad ones, but even besides that I read about more dead adjustables than stockers and most run stock. Then again I woul argue against their(adjustables) use altogether.