I learned recently that I wasn't checking fuel pressure right also. Do you have the FSMs? There'* a specific set of tests you need to do in order to verifiy proper Fuel Pressure.
Decided to just list it.
From the 95 FSM:
Connect Fuel Pressure Gauge
Make sure ignition is off for at least 10 seconds (AC should be off too)
Switch ignition to "On" Fuel Pump will run for about 2 seconds. It may be neccessary to cycle the ignition on more than once to obtain maximum pressure.
Note the fuel pressure while the pump is running. The pressure should be between 41-47 PSI for L27 or L67, 48-55 for L36. Your pressure might vary slightly and then hold.
If you're pressure is steady and HOLDS, you're GTG.
If pressure is NOT in range, you have a bad fuel pump or fuel pump seal
If pressure is in range but slowly drops off, there'* another series of tests you need to follow but it requires some extra hardware. BillBoost gave me a kindasorta workaround for this:
Cycle on and off about 15 times to really load up the rail and start your car. If it sounds like crap when you're starting, you might have a problem with an injector seal, or something else up top.
Also, pull the vacuum from your FPR and see what your pressure jumps to? If it pegs >41, the FPR'* alright.
1995 SSEi - Totaled on 6/6/6 by some jerk who drank at 9am. WEAR YOUR SEATBELT! It saved my life and it can save yours too.