I've never seen anything to suggest that there are different ECM's based on traction control.
You mention that plugs were changed, but not wires, caps, rotors or coils. It is possible that in pulling the wires to install the plugs that a deteriorated wire(s) did not hold up well under the stress. You could ohm out the wires with a digital voltmeter to check them.
I had a '94 with the exact same symptoms you describe in your initial post. The ECM had leaking capacitors and had eaten through the protective film on the circuit board. The replacement ECM totally cured the problem, but I knew I had good (recent) plugs, wires, caps & rotors. A few months later it developed an immediate problem of no acceleration under any conditions. A new driver's side coil fixed that. What I don't know is if the coil was part of the initial problem, but the ECM was enough to compensate causing the coil to finish dying.
If you don't have personal knowledge or receipts from relatively recent wires, caps & rotors replacement, then I would start there. If they are known good, then I would replace those 14 year old coils. If the problem is still not resolved, then I would contact the ECM supplier about how to go about getting a replacement. Fun ain't it? ;)