For those of you running efie's on your vehicles and have mileage gains, can you post what you have your efie set at, what vehicle, engine and LPM.
I think this can help a lot of us out. Also, check your fuses for those of you still trying to set, if you are having your readings jump around alot, I had an 02 sensor fuse blown under the hood, never even thought about it, I've been wasting a week on trying to set my efie and get my engine light out.