usmc680311sl
New member
It sits idling at 1000 rpms and then dives down to about 400 and almost dies and then it jumps back up to 1000 and repeats the process.It has no warning lights or codes.It drives ok but surges once in a while.I think i hear air under the computer cowling.I bought this used recently and haven't changed anything.How do you change the plugs in the middle and back passenger side?Any ideas about the idle?Can Auto zone hook up to this and get a clue what it could be the port in right under the dash.Thanks