Hi Dan,
The suggestions I made were based on the codes you reported. They all point to having started the car without the AMM connected. So, I was thinking you probably cleared the codes by lifting fuse 6 momentarily and tried again, getting the same results. One of the rail connections is the ground for the AMM -- they aren't just grounds for the injectors.
And I know you're a champion of the wisdom to keep known good AMM and ECU on hand. So the only question left in me is the reset. If you do this by the OBD push button, I can't tell you how effective it is at clearing the trim settings, but I do know lifting fuse 6 (on a 92) will clear everything immediately.
--
Art Benstein near Baltimore
"I been in the right trip but I must have used the wrong car." -Dr John
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