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Ted, Question!
I have a 2SS, A8, with Mishy intake. My Car has 10,000 miles, and still averages 27+ mpg on the Interstate....checking mileage the old way. Fuse 51 NPP is pulled...my 1 exhaust tip on both sides is black in a couple days after cleaning.
So is my car still running rich in certain conditions, like hard city driving, but not cruising??? Is a tune needed to help this?
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