No dtc at all and ran great until recently has started to have a rough idle have done numerous things to try to bring mileage back up to where it once was. Did find one of the coils were bad and replaced it but still no change. Kind of wondering if it damaged cat because down stream 02 don't really look right which are both new. Fuel trim long around 3 or 4 + Scanner shows egr/vvt inconclusive just recently which has lead me to that. Before this began it got around 30 to 33 mpg in town and dropped to like 17 only get around 120 to 180 to ten gal or more. Driving me batty have done just about everything possible to try to solve it. Any suggestions
have the same problem?
Friday, September 27th, 2013 AT 7:49 PM