Did you figure anything out ? I have almost same exact problem:
1992 Oldsmobile Custom Cruiser 5.7 L V8
Was running fine till it stalled pulling into Dentists Office. Restarts had only very rough idle, giving gas killed it. After many tries, now won’t start at all, but cranks and idles for about 1 sec, especially with starting fluid, but dies as RPM goes up. Pressing gas peddle does NOT help-makes worse.
I have spark (judged by screwdriver in plugwire) and fuel (as judged by gas coming out of fuel filter when opened or cranking - but don’t know pressure). It was running fine before it stalled- no misses which is usually symptom of bum plugwires.
I replaced Idle Air Control (IAC) already, and inspected/cleaned Exhaust Gas Recirculation (EGR) valve (not dirty, depressing diaphragm pushes out air).
At this point I am thinking some kind of regulatory sensor that is shutting things down. I don’t know anything about these, but things I see in other posts or hear from people are Fuel Pressure Regulator (FPR- Don’t yet know if this car has one), Throttle Position Sensor (TPS - ditto), oxygen sensors, cam position sensors (guy at store said i didn’t have this - never backfired), or God help me, some computer control module. I do notice the “CHeck Engine Soon” light now, but didn’t see it before [What does this mean - “soon”, is something wrong or not?].
Alternatively, is there something stopping fuel between filter and engine (perhaps this FPR?
Please help if you can ! Dental patients are tired of looking at my butt.