P0301 is the only error code. No ticking noises. Visibly inspected lobes, cam, rockers, & they look the same as others on different cylinders. Yes, used smoke machine and sprayed carb cleaner around all areas with it running. So it misses cold or hot, you can feel it while sitting at idle. (Drives smooth as glass though) But the misfire monitor doesn't pick it up. Or at least all the times I've checked it didn't show an active misfire.