I had my JIC exhuast installed two weeks ago, first tank of gas I was running 16miles per gallon. Second tank went back to normal 33miles. Now, it is as bad as 3-4 miles per gallon. I'm not sure if it is the exhuast or anything else. I'm going to have it check. Do you have the same problem?? After simi modifie, do you reset your ECU??? Please let me know.

TonyM

I had that exhaust for a month and nothing happened to me. 4-5 mpg? How is that even possible? Maybe something diconnected and your leaking gas or something. When you go to W.C.Toyota, ask for Mike, like the first or second window, he gives the best deals

yea..theres no way u got 4-5 mpg....
u better have u car checked...

try reset ECU, clean air filter... 8)

Maybe what you need is a new calculator... J/K

Something defenantly is wrong if you're really only getting 4-5 mpg. Take it back to the dealer to get it checked out.

I lost 2-3 mpg after I had the AEM installed.......now I'm getting 27-28. No, I'm not racing around all the time, these are mostly highway miles.

Really gas mileage shuold increase because of the removed resttrictions and free flowing air, but....

MORE POWER = HEAVIER FOOT