Hey guys, I thought i would try and ask anyones opinion on here this sites great. Ok i have a 99 ex and awhile back i bored out my cat but did not do the disconnect battery for 5 mins then replug it and let the car idle for 5 mins so the computer adjusts the air/fuel ratio. So a little down the road my engine light came on and had it checked out and they said its emissions like i figured. My question is do i have to replace my 02 sensor, is there anything i can do to get my car running normal? It doesnt seem to get the 34ish mpg it used to get when i first bought it, although it does have 115k miles on it now.. Any responses will be appreciated. Thanks!- Clay

 

put a stock cat back on it and that will fix the problem, or a aftermarket high flow (with the high flow the check engine light will stay on still b/c it flows more than what it like is to so it says that theres a problem b/c it dosent knowwhats goin on (the ECU))

 

I know i should just buy an oem one from anyone. ANy good suggestions on where to find one? Places usually want around 300 bucks for one. - CLay

 

get an o2 simulator, it tricks the engine into thinking the exhaust flow and emissions are perefect, when in reality you can have an exhasut system on. Read about it and order one for like $25 (get the universal one) at: www.o2simulator.com