engine misses at idle on 2002 Mercury Sable

engine missing at idle and up hills when going slow. no warning lights. has 109,000 miles what could it be?

1 answer
Have you had your spark plugs replaced yet? Worn plugs can be the cause. Other ignition issues, such as a coil issue, coil boot issue (both for DOHC 3.0L V6 24V engine), ignition wires (3.0L V6 12V engine) can be the cause.