I cut the catalytic converter out and the car starts up, but only runs for about 45 seconds then cuts out. It will start up but chug again. When it runs for the 45 seconds it runs fine. Be advised I have a bypass test hookup going through both tailpipes. The reason why I cut the cat out was because the cat was all black in side and appeared all black. I ruled out fuel is not the problem anymore, neither is spark. Could it possibly be the EGR valve or something else? -THanks Chuck 89 300E
- posted
18 years ago