fuel pressure

[stockcarkid3]

i have the 99 ls1 and when i check fuel pressure its aroung 85-90 psi itss flooding the engine making it run poorly.I talked to th guys at S&P and he told me if i was installing the ls1 in a 96 or newer and i had the older 99 ls1 that i could run my stock setup.i have a supply and return on my engine but i am getting nothing on the return side.ANY suggestions THANKSSSSSS Timmy

[NITROUS]

How is your fuel supply and return set up? Are you running an aftermarket regulator or the 97-98 vette fuel rails with return line?

[stockcarkid3]

i am running a completly stock setup.I have the original fuel pump from the 96 vortec truck, original filter, and its connected to the 99 ls1 stock fuel rail .I was told by S&P that this setup was fine but its not working for me any ideas ???

[NITROUS]

If you're running the stock 99 fuel rail, there's just a dampner in the rail. You need to get a 97-98 vette fuel regulator to replace it with. How did you make the return line work?