What causes this?
Okay i thought my cat was going bad, it had this god awful buzzsaw like sound at 2-2200 rpm, but today my car at a stop light just randomly idled really rough, and then when i tried to go, nothing happened, gas was fully in and car didnt move, turned it off and back on, check gages was on, and seemed like the engine wasnt moving. let it sit for a second and it cranked over fine and i was able to pull out, but when i did the car seemed to jerk real hard (heard this is also a symptom of a bad cat) and a noticble loss in power trying to pull out in traffic., check gages went off once the car was moivng. It seems like the buzz saw sound at 2k rpm has gone aswell.. Could all this be caused by the cat?