Originally posted by ScoobieSnaX
The car didn't show any signs of a missfire. Smooth acceleration, no issues other than the CEL.
I have 20K miles on this baby and this is the first time I've seen this code. It was running quite rich for the time I was running the stock ECU (waiting for UTEC to ship) which was about a month or so. Could this have fouled the plugs?
I vote for plugs. Modern day ignitions are far better than they used to be, but if I'm reading your post correctly, you ran Sti injectors with the stock ECU for a month...wouldn't hurt to swap in a fresh set.