What are possible causes of a misfire in third cylinder on a 1997 Dodge Intrepid?

Answer 1

The last two weeks have been trying! My 2.7 engine suddenly started misfiring very, very badly on multiple cylinders......posible cause.....coil, plug wires, plugs, and others like a vacume leak per Auto Zone......Readjusted the plugs (had only 10,00 miles on them) and replaced the plug wires ( 1 hundred thousand miles on them) after putting on a new coil and still having a small misfire (a major inprovement on the multiple misfiring when at first I tried a new coil) The misfiring stopped. The engine ran smo-oo-othly. Two days later after about a 50 mile trip on 40-70 MPH roads, the car quit in trafic at about 45 MPH. It would not start. The engine cranked fastly but semed not to fire at all. After being towed, the mechanic could not find a problem because the engine fired right up the next morning....Two days later the mechanic gave it back to me (for only $94 bucks) because he could not scope out a problem. That night the headlight would not come on for about 10 miles then presto! The headlight worked. The running lights never went out. The car still idles perfectly. I pass this on to you only so you may be prepaired for a major search. Auto Zone's first code was misfire on 3rd cylinder.