Idle problems..Surges up and down?
Within the last couple of weeks, my 2001 Expedition (4.6L) has had some idle issues...
When I am in drive, and come to a stop, like at a red light, the engine seems to surge up and down. This doesn't happen when in park, only when in gear, and is starting to worry me.
What is this a symptom of?
thanks alot