I have a 98 Dakota 3.9L V6 Sport with 96,000.00 miles with a misfire in cly #2.
I've had it to 3 different shops and they can not find the problem. They have checked the fuel flow in the jets,the compression,spark plug,gap,rotor,and wire and haven't been able to find anything wrong.
It seems to only do it when idling they say.
I'd like to find out more as to why this is happening before I'm forced into taking it to the dealer.
Any info is greatly appreciated.
Thanks in advance.

 

I had a misfire in cylinder 4 a little while ago. Did a full tune up (plugs, wires, cap and rotor, as well as cleaned out the air intake) and it fixed mine. When the shop checked your plugs, wires etc did they recommend changing them? Supposed to change them every 30,000 miles.

 

They didn't say to change them.They were change about 2.5 years ago. I just put new plugs in it also. When I took the plug out of #2 it had a rust color to the white post in the center.
Thanks

 

i had the infamous check engine light on a while ago, checked it at my shop and got cylinder 2 misfire as well. so i did the plugs cap rotor wires to star, since it only seemed to do it at idle, and got the rusty orange lookin plug from cylinder 2. Then i changed the cylinder 2 injector, but that didnt seem to change anything. Im sort of at a dead end. The only other things i can think to test would be the egr valve, of which i cant find, the power control module. Or do a compression test on that cylinder. Any one else run into this problem before that can help us? Thankyou.

 

Uh, the 3.9 doesn't have an EGR valve.

I could be wrong though, it's happened before.
The divorce is final in July. :-)

 

replaced the injector that didn't do anything, do i did a compression test on the cylinder and it was at 95 lbs, all the others were at about 140... Im afraid im gonna have to do a valve job. Has anyone else run into this before?

 

I had the same problem with mine...check your intake manifold for warpage....