I just baught the grand am an noticed it needed intake gaskets we replaced the gaskets from intakes all the way up, after we changed them them the o2 sensor was reading bad, my first clue was the cadilac converter cause of the carbon build up that was in the throttle body, I cleaned it up, an flushed the engine twice due to the coolant being really nasty, brown. So when I took the converter off I noticed that it weighed aboout 60 lbs the honey comb inside of it was gone tons of sand. I changed that an the engine light went off. But noticed it had a slight of a idle issue when you started it it would idle extremely high at two thousand rpm. It would slowly drop down after a minute but sometimes wouldn't go down at all. No mind me the transmission had a little jerk a slight little jerk. But after I changed the (iac) for the idle noticed that the car don't idle up real high anymore it just idles up an down up an down now, an the transmissions jerk has become very seriously, where it'll jerk the whole car hard when shifting gears.
Tuesday, March 6th, 2012 AT 4:04 AM