My 95 SSEI began shifting rough and has a noticable miss when I rev the engine. My transmission went out and was replaced last week, and I still have the roughness while driving at highway speeds. Yesterday it started making a popping noise under the hood. I investigated and found that the popping noise was at the post where the number one spark plug wire connects to the first of the three ignition coils. I replaced the ignition coil (1 of 3), and the popping stopped. However the engine still had a miss when reving, and within a minute, began running very rough. Too rough to drive. I put the orignal ignition coil back on- the popping started again, but the car is driveable with a little roughness during some shift points, and a noticeable miss when the engine is reved. Any ideas what I should try next? I might have to replace all three coils. I just had the transmission changed, but this problem was going about two weeks before the transmission was replaced
Apr 12, 2008 at 2:50 PM