I have had misfire codes going on and off for awhile. I finally got around to changing my plugs to Champion and cleaning out the MAF sensor but the code p1313 keeps coming back (flashing & solid, then off, and back on). I know it's probably messing up the cat but other than that, I have no idea what to do or where to start. Truck seems to be running well. I passed emission tests when the CEL went off for a day, but it has come back on. Any clues/ideas/solutions? I was told I may need a front head gasket soon as the valves are leaking a little.
Thanks!
Thanks!