2000 Saturn LS2 3.0L Vin "R"- Vehicle loses power under heavy acceleration. Say, you're at a stop sign, you begin to accelerate away and you're doing just fine. If you Floor the accelerator pedal, RPM's will jump to 4 grand and remain there. Vehicle speed seems to remain steady (no speed loss or gain) and the transmission doesn't shift, period. That is. Until you release the accelerator pedal maybe 1/4 - Then all is back to normal again.
Fuel Pressure - Key on, Engine Off - 0 PSI! Yes, 0 PSI.
During cranking & running, however, it goes up to 42 PSI
With a fuel pressure gauge attached to the fuel pressure test port DURING a test drive, the fuel pressure is still normal (NEVER drops below 40 PSI) even when this issue occurs. Perhaps ruling out the jet valve on the pump module.
Tried: Cleaning the throttle bore & "reprogramming" the throttle body with alldata procedures.
Cleaned MAF sensor w/MAF sensor cleaner (purchased at auto parts store)
Replaced Fuel Filter (old was definitely clogged)
Flushed fuel injectors with Wynn's Fuel Injection Power Flush system
I'm contemplating replacing the fuel pump, but at $250.00 new-aftermarket, I don't want to spend it if I don't have to.
There are NO DTC's in the OBDII System, period.
Friday, March 18th, 2011 AT 3:33 AM