Hey, I posted a previous note, and I appreciate your help. I'ved tried everything. Here's the details and work I've done so far: 1993 Astro 4.3 l with Throttle body injection, 123,000 on the clock. Previous owner said it ran fine, parked it, next day it wouldn't start. He tried starting fluid. It fired and ran, and stopped. I thought, gee; It's not getting fuel, must be the fuel pump.
Making a long story short, I dropped the tank, rpl. the fuel pump, then fuel filter, the fuel pump relay, no good. SOOOO.. using the advice from this board, I got another (used) ECM computer.. no good.. I replaced the fuel pressure regulator with a new one. NADA. I cracked open the fuel lines to the TBI and gas under pressure squirted out all over.
I've got good ignition, compression, and fuel lines with gas pumping to the TBI. Checked all the fuses.. OK. I even borrowed a test light from a mechanic & hooked upped to the injector connectors.. sure enough, I've got 5 volts flashing on both of them.
Both injectors read continuity on an ohm meter.
What gives? What could cause this engine to die an overnight death and refuse to squirt a tiny drop of gas into the manifold? No burp, hiccup, backfire, nothing?
Any help would be greatly appreciated... Thanks.
P.S. it stills runs with starting fluid.

A mechanic said I should replace the Ignition module. Anybody ever hear of an ignition module keeping the TBI fuel system from working on a '93??
sigh. all I wanted was to get it to start. I've totaled it out allready. spent more on parts than what the van cost.
thanks for your help. J.

These kind of no start questions have been covered many times over recently it seems. Must be something in the air. Since it will run with starting fluid, and you're sure you have fuel pressure, I'd find the oil pressure switch. I'm not sure where this blasted thing is located but I know it's caused many people the same troubles. If this switch does not sense a minimum amount of oil pressure it will not allow the injectors to fire.

I doubt the ignition module is the problem since the van will start and run on starting fluid.

These kind of no start questions have been covered many times over recently it seems. Must be something in the air. Since it will run with starting fluid, and you're sure you have fuel pressure, I'd find the oil pressure switch. I'm not sure where this blasted thing is located but I know it's caused many people the same troubles. If this switch does not sense a minimum amount of oil pressure it will not allow the injectors to fire.

I doubt the ignition module is the problem since the van will start and run on starting fluid.

Thanks, CD. I appreciate your reply. Thanks to this board, I'm aware that if the system doesn't "see" oil pressure on certain models, the fuel system will not work, hence, no engine start. I don't which rocket scientist came up with this idea... I guess it was the result of numerous consumer complaints from stupid people who never check their oil, and then proceed to burn out their engines, and bitch at the manufacturer for not making their engines more "idiot-proof". DUH! Check yer dipstick once in a while, people!!!
Anyway, for what it's worth, I've got good clean oil on the stick; also I have a dial type oil pressure gauge on the dash, and when I crank, the gauge reads over half-way. I've got plenty cranking oil pressure according to the gauge. This means I have an oil pressure sending unit that works. IS THERE ANOTHER OIL PRESSURE SENSING UNIT/SWITCH THAT I NEED TO REPLACE? sigh. I kinda miss carburetors and mechanical fuel pumps. Thank you all for your help.

Yes I believe it is a seperate sending unit.

Have you got a factory service manual to work with??

Yes I believe it is a seperate sending unit.

Have you got a factory service manual to work with??

I found the oil pressure switch and replaced it. It's right behind the distributor. No help. I even rpl. the ignition module. NADA.
I got it running today!!! Know what the problem was?: The throttle body injectors were "stuck". The van had been sitting for a few years. How did I "fix" it? It's so simple I could scream. I took a screwdriver, and held it backwards, used the handle part to beat/tap/knock on the injectors while cranking. Fired right up. DUH.
They don't tell you these things in auto manuals. I owe my mechanic friend/advisor lunch or something.

It's the old Fonzarelli trick... Remember: The Fonz on "Happy Days" would slap the old jukebox, and it would play his favorite song, and he didn't even put a quarter in. Just gotta smack it just right in the right place sometimes.
Thanks all for your help.

Hey if it works, it works!!