I recently bought this family van and after driving around for a while and then stopping, I notice the engine revs up and down. I'd say it only revs up 500 RPM or something- not drastic-, but I'm just wondering if anyone has had anying like this happen.
I changed all the plugs and coil packs... there has never been a check engine light. Gas milage seems to be around 9-is that normal do you think for a 5.4L?
Thanks all in advance.
-supa