fuel problem help
 

I have a 1988 camaro supercharged 30 pound injectors 6:1 fmu 255 walbro pump i am having a 3/4 throttle ping so i put a fuel gauge to check pressure went on the freeway and at 60 mph fuel psi was 35 and at full throttle fuel jumped to 45psi,i`am using a fmu so my fuel psi should be over 60psi right not 45psi.

45 psi is right around stock

35psi is about stock for closed throttle(idle vacuum) and 45 psi is around stock for WOT. The fmu only increases pressure when in boost, where you in boost? do you have a booster pump? usually people use an inline booster pump to aid the high commanded fuel pressures by the fmu. my guesses are that your pump can't do that pressure anymore or the boost reference blew off your fmu.

i have a walbro gss340 hi out pump