S
samantha s
Guest
The truck started acting up a while back. It started shimming. I would call it. If I get the rpms up it acts ok but when they go down it starts shimming again. I just had the spark plugs changed. I took it to auto zone and they put it on their computer and said it was " missing on 2 and 4". What are they talking about? Somebody please explain it to me. I need it fixed asap.