My wife asked me to drive her car today to investige a rough idle. The car has 20k on it and the A/C was off.
In Park - No Rough Idle In Idle - No Rough Idle In Drive - Rough Idle when stopped - The idle oscillates very regularly - about a second high, then a second low and so on.
Any thoughts. Going in for 20K service.
Thanks Chip Long Rock Hill, SC