Mechanics

MISSFIRE

Mercury Tracer

I got a 1997 mercury tracer 170000 miles on it. Cylinder 4 misses at idle or in slow RPM then car start running smooth(by turning on AC it happened more often). Replaced sparkplugs and wires still same. Do you think I may have a bad fule injector
please advise
thanks
sam
Avatar
Samsimon
June 19, 2006.



Could be a bad cam sensor.

Tiny
Eperry
Jul 21, 2006.