This is a discussion on Tuned 2.8 ECU help within the Computer and Fuel Systems forum, part of the Audi Reviews category; Hello, I just recieved my Speed Tuning ECU for my 99 A6 2.8. alas it causes a check engine light, ...
Hello, I just recieved my Speed Tuning ECU for my 99 A6 2.8. alas it causes a check engine light, when I swap in my old ECU the light goes away.
Can anyone give me some tips on how to go about fixing this?
thanks,
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