i was wondering if someone has ever seen this happen i start my car runs good 4 5 secs then sputters and eventualy stalls and i have rich exhaust but when it gets warmed up its ok but itrunns at 1.500rpms i changed plugs wires the tps duno what to do now plzz help

that happened to me one time.

and now i'm putting a new catalytic converter in.

get your exhaust system checked out, meineke won't charge you to take a look under it and see whats wrong with it.