I turned my fuel screw in another 1/4 turn. Power increased a bit. (I can now hit 40 psi of boost easily) It was already turned in but I don't know how much. Twice now it has cut out on me when I hit full throttle, usually when I'm in second or third. It acts like you pulled the kill lever on the side of the pump. The truck still runs but it drops to an idle. The first time it cut out I let off and then it was fine. Today I let off and stepped on it and I had dead pedal for about 20 seconds. Then it was fine after that. I think I'm running out of fuel. I still have the stock lift pump. My new high pressure piston pump isn't on yet....... I have the fuel screw turned in, starwheel is backed out so the spring is tight, my fuel pin is ground a little, and I removed the nylon washer. Any thoughts? Thank!

 

Change fuel filter and go from there.

 

Check your electrical connection(s) at the shut off solenoid. A loose connection here will cause these symptoms.

 

Change the lift pump!!

 

The filter was changed 4k miles ago. Connections are all good. (I've gone through that before). I know, I should beaten with a rubber hose. I have the lift pump, fuel lines, fittings, and extra filters in my garage. I guess it's time to put it all on. I just want to make sure I didn't do something wrong by the way I have my pump tuned. I guess it's hard to tell when I know it's starving for fuel. Thanks guys.

 

It is very easy to knock the fss connection loose when u turn up the pump.

 

do you have a fuel pressure gage? im betting that your starving it of fuel at wot