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Ha, some things never die. Every year or two I get a notion that my issue is simple & if I just take another look the solution will be found. Fail. Maybe this time will be different.
Current setup: unplug the stock IACV (leave it bolted to manifold) & plug it's harness into a dummy IACV that isn't physically attached to anything. Simply unplug the TPS to prevent a high idle. Completely eliminates the cruising/jerk condition but it has trade offs. The idle upon cranking is rather low (no big deal) but the alt. volt reading is pegged at 14.4v, I assume the TPS CEL disables the ELD. I put everything else back stock & the jerk returns with a vengeance, but the volts fluctuate like they are supposed to. The fact that I can't figure out the problem is almost as infuriating as the side effects themselves. Any thoughts?
I've thought of slowly testing each component one at a time by making sub harnesses directly wired to the ECU in case the signal is getting molested along the way somehow. This IS an ODB-0 car with OBD-1 jump harness after all, and it has never behaved stock.
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