1992 S10 Blazer Won't Start

[Blazing Rice]

I have a 1992 S10 Blazer 4x4, 4.3 TBI. 104,000 miles. The refuses to start up unless cranked excessively, and if it does eventually kick over, it runs/idles like crap. The engine will rev up to around 3500 RPMs, and which point the motor shuts down almost as if the key was turned off. I've replaced the following hoping to axe this problem: plugs, wires, cap, rotor, coil and ignition module all to no avail. When the truck is in gear, it will stall out when under load unless the gas pedal is feathered VERY lightly. I need to fix this, as this is my only form of transportation right now and I've been walking for a long time. Please help me.

[cobra1]

check the fuel pressure and ignition timing.

you should have 9-13 psi with the key on, engine not running.

[Rbraczyk]

Try simple things like PCV valve, and also try the 02 Sensor.

[tom3]

Sounds like fuel supply to me too. Hard to check fuel pressure, have to cut line, but if the pump has never been replaced, it's due.

[crank182]

Did you ever find out what was wrong with your truck? I have a 93 with similar problems and i checked/changed everything i can think of and other people have told me to no avail, let me know, my truck sputters, runs like crap when it heats up, stalls ocassionally and smokes and leaves carbon looking dust out the exhaust, i changed the o2 sensor,distributor,cap,rotor,coil,pickup coil,modual,wires,plugs,checked timing,pcv,fuel filter,injectors,changed gas in tank/flushed/battery and wires,cleaned and checked throttle body, temp sensor,radiator,thermostat, air filter,cleaned out the valve that recycles the fuel on the back of the throttle body, can't think of it right now. If you can think of anything else making my 93 4.3 s10 blazer run like crap let me know, thanks. also recently rebuilt tranny, new shift linkage, syncro rings, gears, and all seals, new clutch, pressure plate, throughout bearing, pilot bearing.