Gas mileage issue
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I know there are dozens of threads talking about bad gas mileage after a header install, and how a tune is supposed to fix it. But, I was talking with the guy tuning my and he told me there was no way to fix the issue through tuning. So, is there a way to bring my gas mileage back up to a somewhat decent amount? As is sits right now i'm getting around 10 MPG in town. Any help would be appreciated.
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If you're getting 10 mpg there's something wrong besides the tune. I am getting the same mileage as stock if not slightly better after my header install, and I have not had it tuned yet. If I had to guess I would say your car is not going into closed loop, what did you do for 02 sensors?
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If you're getting 10 mpg there's something wrong besides the tune. I am getting the same mileage as stock if not slightly better after my header install, and I have not had it tuned yet. If I had to guess I would say your car is not going into closed loop, what did you do for 02 sensors?
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I never directly dropped them. When I was taking out the stock manifold and cats I kept the sensors in the pipes and just disconnected them where the wires clip in. They may have experienced some shock, not sure.
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car drives great, no misfires. I got it scanned a few days after the install and the only thing that popped up was the rear o2's. Is it possible that a new intake manifold could be causing this?