Have a 2005 Mitsubishi Endeavor that is misfiring, or feels like it, runs rough sometimes. There isn't a set event or condition that I can pinpoint when it will do it, seems kind of random. I had this previously and got a CEL with a misfire on cylinder 3, so I replaced the coil pack and cleaned ground no. 11. Now it is happening again. The only thing it throws is the traction control light.

Any experience with this?