Anyone here experienced enough to adjust the ECU to allow for a larger diameter exhaust, therefore decreasing the back pressure? I am trying to keep from ruining my fuel economy.
WHAT VEHICLE? :sonicjay:Planning on a total overhaul of the exhaust. Hedman Tuned Headers, no cats, flow pro mufflers all the way back, true duals, with exhaust dumps and eletric cutouts. Oh, and getting rid of the stock 2 1/4" and going 3 inch. Maybe. Still in planning stage.
It's not the front cats that provide the feedback - it is the front 02 sensors, but I think you meant that.The issue is not the backpressure, as far as I know. It's just the rear o2 sensors. I believe you can buy O2 simulators to fool the ecu into thinking that the cats are doing their job. The front cats you want to keep as they actually provide fule mixture feedback into the ecu.
Of course, there are many that know better than I. I'll shut up now.
what year hoe?Thanks- I am not doing this because I think my fel economy will improve, I like loudness. But I know you can ruin MPGs if you have decreased back pressure. I also have O2 Sims which I will put in, but the main question I am asking is about ECU reprogramming. I am interested in resetting my fuel trims if the back pressure is decreased.