Rough Idle and Sputtering
Ok so I have a 1994 buick park avenue and it would cut off while i was driving on the highway and the check engine light came on, I thought it was because the radiator was the issue so I replaced it. Then it stopped cutting off for a couple days, and then started cutting off again. Then I was told it was the ignition module so I replaced that and it ran fine and changed out the tensioner pulley assembly today and now it has a rough idle and the rpm gauge goes up to 1500 rpm and drops down to 1000 rpm but sputters. Anyone know or have an idea on what it could be?