1994 Chevy Blazer troubleshooting, can you help?

Working on a 1994 S-10 Blazer, 2x4 4.3 W code. Last year it had a dying issue. I replaced the module, plugs, cap, rotor, and filters. Ran good for a good while, then she said the transmission was slipping. Not the case, it was a dead miss at a certain throttle position, great when hammered, at a cruising position, bomm,------- bomm-------bomm. You know that sound, sometimes smoothing out until the throttle was moved again. Not many complaints so I let her roll until it had become very bad. No codes ever came up. We started on it couple of weeks ago with replacing some rotted vacuum lines. Better on idle, still bad/worse dead spot. Replaced the TPS, ran great until it got warm, dead spot came back, then never left. Checked the cap and rotor, it had a meltdown like it was a victim of friction at the center, replaced them with quality parts. Read some on EGR issues with carbon buildup, so… phlegm off and cleaned with carb cleaner, mass air flow sensor cleaner on the sensor, cleaned egr but didn’t test. Very high dollar electric jobby. It ran good, fuel pressure was good, but sometimes drop a bit below spec. Parked it happy, and running.

Next morning wouldn’t hit a lick. I put the fuel pressure gauge back on, not a bit of pressure when I screwed the fitting on. Turned the key to on, pressure. Started, running rough, then would die.

When it finally stopped it’s dying spells we decided to run it to a friends 30 minutes away. Bomm,----------------bomm, all the way to their road and it died. Had pressure, no start. After 30 minutes it would start, running like crap. So,… MAP sensor no help/worsens, fuel pressure regulator, & fuel filter no help/same, fuel pump, an 4’ $30 piece of hose,………. Won’t hit a lick. Pressure close to spec, my gauge may be off. Put a test plug on a wire, it’s a yellow looking fire.

I hate this truck! 94 is the in-between on the code readers, just beyond the jumper wire setup. I can’t keep blindly throwing money at this thing. With all the temp sensors, ECM or whatever they call that one, I don’t know where to start. Could be a corroded wire anywhere!! What would you look at next?

I’m going to double check my spark on other wires, test the coil, and have the module checked at the Zone.