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I need help here please... powerloss above 3500rpms, idles to low in drive, stalls at stop lights periodically, wandering idle at times. no check engine light (just on because of rear o2 sensors, OR-H) tried; cleaning MAF cleaning IAC replaced TPS replaced fuel pump replaced fuel filter...

When i bought my car 2 weeks ago i crawled underneath and saw that the OEM mid-pipe was hacked. The old owner cut a square in all 4 cats and gutted them, then welded the pieces back in. needless to say, it was leaking at the welds. So i ordered a MAC OR-H pipe and installed it. I have a leak...

sup guys...i have a 2000 mustang gt, auto i just recently purchased...when its warmed up, it seems to start hard..(long crank time, then stumbles to idle and sometimes stalls) after the rough starts it runs great! no MIL (just the ones for rear o2 sensors because of the OR-H)...when its cold it...

Whats up guys....i just purchased a car that i have wanted since i first heard the exhaust note in high school...2000 mustang GT convertible, auto, 4.10's, OR-H, Borla stinger cat-back, 68mm TB, K&N intake...its not perfect, but i love it and am enjoying working through some issues with it.