Ari G

iTrader: (25)

I´m measuring my FP and its 37 at idle like it should be but when i remove the vacum it´s raises to 38-39 and the needle spikes/shakes,i would beleve the FP should be 41-47Psi with no vacume?Is my FPR bad?

I´m going take the gauge and tape it to the windsheild and make a wot run,should th FP be at 43 at wot?

chromeplated500

iTrader: (10)

The gm tech told me 41-42. im not sure about WOT. you should als shut off the engine and make sure it hold pressure pretty good...

Ari G

iTrader: (25)

drops like a rock after i switch iff the ignition

Ari G

iTrader: (25)

Took it out for a drive,it´s steady on 37 psi and when i try to make a wot it just drops to 30psi

Is it then the FPR that is the cause?i don´t see anythin else that could caus it to drop?

Ari G

iTrader: (25)

anyone has been thru similar stuff?

Formula350

iTrader: (3)

Clogged filter or maybe a bad FPR. Could be bad injector/s.

OutlawZ

iTrader: (4)

could be bad FPR.... could be clogged fuel filter or a bad pump..... the injector wouldn't cause the rail pressure to drop so that's not the problem.... i'd say start with the filter since it's the cheapest.... after that replace the FPR..... if that doesn't fix it get ready to cut that access panel to your fuel pump underneath the rear carpet... unless you like dropping the tank......

Formula350

iTrader: (3)

You've never seen what a leaky injector can do then. Prime the system, and watch the fuel pressure slowly drop to nothing.

Ari G

iTrader: (25)

I aggree the injectors coulden´t drop the pressure that fast(like a stone) and the FPR is unlikely so i cut an access panel and saw that the hose from the pump the the lines was not sealing up,bought a new fuel hose and threw the TRE line in the garbage

Now it´s fine,pime it and the pressure shoorts up to 50psi and holds 41psi at idle

Thanks anyway