2004 Monterey - Misfire

[thetandycollector]

I have a Mercury Monterey in the shop that has a random misfire. Tried cleaning the injectors, replacing fuel and air filters, checking fuel quality, plugs and wires (which I may add are a pain in the rear to find). Still misses, gets worse when AC Compressor kicks in, seems to run fine at Hwy speeds. No codes except random misfire. Help?

Bill - Eagle Automotive

[TRINI55]

Tandy
engine misfire under load, re-check wires and may need to replace plugs also

hami

[rivguy]

has this had a new cam sensor put in it recently? I have seen a lot of them put in wrong and cause random miss issues. also had a few under tsb with egr sticking open. also check imrc runner control for binding and miss at low rpm.

[thetandycollector]

Problem solved guys, do appreciate the input. Coil pack was actually hairlined down one side and was not applying enough current intermittently to two cylinders. Thanks!