i bought a 2002 mustang gt just a few days ago with 57xxx miles it was bone stock and ran fine.... i put flowmasters on it and now when i floor it, it has a little sputter like its not getting enough fuel or something but it will go through 1st an 2nd with little to no sputter but once i hit 3rd gear at about 4000 to 4500 rpm's it platows an sputters...or it could have been an issue even before i put the exhaust on it, it just didnt happen to me so i dont know... "its an automatic" what could cause this? any info helps thanks
