Did you gap them properly?
Did you gap them properly?
Good suggestion. I'd pull the #2 plug, check gap. If gap is off, re-gap. If gap is good, swap the #2 plug to a different cylinder. If the misfire follows to the cylinder with the original #2 plug, you've found your problem.
BTW, what brand plugs did you install??
Anything obvious come to anyone's mind? All I did was change the plugs. Its a 2001 with the coil rail pack (not individual plug wires). Now it idles rough and the P0302 fault code is present. Thanks.
I also used the spark plug boot grease. I put that on the porcelin end of the plug as well as inside the plug boot. Did i maybe put too much on? I put on what I thought was a reasonable amount.
jeep uses ngk plugs on the coil on plug egnines and there is a pcm update for a erroneus misfire condition. if it ran fine before you replaced the plugs, i would think you have a bad plug
It wasn't raining while I did it, and it was done in the garage. I put dielectric grease in the boots and on the proper part of the plug.OP- any chance it was raining when you changed the plugs or has it been raining? Check to see if there is any moisture getting to the spark plug.
FYI, I had a misfire cyl 2 a while back. Come to find out there was a pinhole leak in the heater hose that was dripping down onto the spark plug and shorting it out. New heater hose, problem solved. $8.