Idle Problem help So i just replaced my catalytic converter. 10 Miles down the road it the first plug goes out with a CEL. I replaced it, it works for about 100 miles, then it goes off again. I have noticed that every once in a while my car will idle rough, drops to low rpms then goes back up to 700 or to even a 1000. I know i need a new valve gasket and that is getting done this weekend. I am going to check out my lines to make sure i dont have a vacuam leak anywhere, can u guys give me any pointers? thanks zach |