My Outback started running a little rough, and the check engine light would periodically come on (which also made the cruise control not work, and the cruise light to flash). Sometimes I would be driving down the freeway with the cruise on, and I hit a small bump, which made the check engine light come on and the cruise to stop working. I took it to the auto parts store about a month ago, and there was only one misfire (I thought it was #3, but I could be mistaken. It recently got worse, so again, I took it to the auto parts store to do a code scan, it came up with P0301, P0302, and P0304 which is misfire in cylinders 1,2, and 4. It's probably worth mention that my Subaru is past due for it's 60K Service.
I also just changed the plugs, with identical NGK's which made no difference whatsoever. I did some browsing, and it seems there are a few common culprits: Ignition wires, Coil, Timing belt?
I am going to try running the engine in the dark to see if I can see any sparks on the ignition componets, once I get that knocked out, I will update.
Any suggestions, or ideas will be recieved with much grattitude!
Edit: Sparks observed by the wire boot on the coil side. I am gonna go pick up some plug wires and dielectric grase, and see what happens.
Edited by hancho3, 30 June 2013 - 03:00 PM.