Mt. Pleasant? Why didn't you come to my BBQ last weekend?
I'm 10 miles west of Mt. Pleasant, halfway between Mt. Pleasant and Remus. Ever heard of Weidman?
That said, I don't have a compatible computer to switch with. But from personal experience with a computer on a 95 ATX that experienced very similar symptoms (that was also bad) I suspect that might be the case.
If you can get it to my shop we can do some exploratory surgery
Edit: Just saw your other thread about the no-run situation. I'm going to offer an educated guess and say bad crank sensor. Much more likely than a bad PCM, and as far as it not spitting codes, you may not have it jumpered right if it's something you're not familiar with. Crank sensor is a PITA to get at, got to tear apart the passenger side of the motor. I've done them. With the age/mileage I'd be worried about crank cancer getting that crank pulley off there.
Here's the million dollar question: Does the tach rise up at all when the car is cranking over? It should at least lift up to a couple hundred RPM or so. The crank sensor drives the tach, so no movement on the tach while the car crank would definitely point to a bad crank sensor. Even if it does move, crank sensor could still be bad but a non-moving tach would be a nail in the coffin.
Bad running/idling can be a combination of cam sensor and MAF sensor.
I'm crazy swamped this week with work, but would be happy to at least look into getting some codes out of it for you.