[mikie c.]

The code reads egr flow excessive with nothing done to it so I bring it back to the dealer and fixes the code problem so everything is good for a month and I buy a superchip 1805 tuner and a high flow air box complete put both in and run a tow tune in 2 days egr flow excessive po402 IS BACK I return back to stock clear the codes leave the air box and the code comes right back the same day ANY IDEAS????
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this is a 2006 f-350

 

[mikie c.]

almost forgot its has a cat back dual ATS exhaust system also so it only has the 2 modes in it