I believe it was sharkskin that has that extensive website regarding what to do with that god damned relay board that is in the most stupid place that it could be - under your passenger's feet. What the hell were they thinking in the first place?

Anyway, Anyone reads this thread in a search when having the same problem, take this damn board out and clean EVERYTHING. Wally said De-Oxit from Frys (West coast) radioshak (everywhere)

 

Guys.............sorry I missed this thread earlier but FYI you can run the car, at least my MY, with a mix of OEM and alternate eproms. When I installed my GT eproms I did the EZK first and ran it that way for 6 weeks or so with the stock LH prom in place with no worries. Then when I swapped the LH prom again there were no issues. My GT eproms were blasted by John speake.