spitss sputters and loses fuel presure

[cbr600teardrop]

i use pocketlogger and can check codes it has no codes and when it its 4500 or above it will go higher than 4500 it just missis and spitts and sputters and the fuel pressure drops when it does it and when i turn off the car the fuel pressure drops to 0 instantly iv got russells clasic pro -6an line from tank to a fuel lab fuel filter and to a aem fuel rail and to a fuel lab afpr and a walbro 255 hp and no leaks that i can see iv checked every hose and line and connector

 

[Colt4G63 also]

Either your pump is dead, or it's leaking where the pump attaches inside the tank, or your filter is clogged.

Don't drive in boost like that! Hook up a boost leak tester, or just put a hand pump on the FPR vaccum line, then turn on the pump with the check connector and the engine off. That way you can simulate boost, and check pressure and test your repair without risking running lean under boost.

 

[cbr600teardrop]

i just put a new pump in today because i thought the old walbro was bad also the pump is rewired with a stm kit

help somebody please help