I've been getting this misfire code for quite awhile now. It first showed up about 4-6 months ago. First thing i did was check compression in cylynder 5 and it was fine. I found a air leak that i had for quite awhile between that time that I fixed. Check engine came on went off and came back after I fixed leaks and changed pluggs. Changed the coil, spark plug wires and gapped and replaced the spark plugs after light came on. P0305 is a misfier in cylinder 5, thinking it was the cylinder 5 fuel injector I ripped the plenum off and cleaned and swapped the cylinder 5 injector out with cylinder 6's. Check engline came on strong right after putting it back together and still read codes for cylinder 5 misfire. I reset codes and ran it about 60 miles and light came back reading misfire in cylinder #5, ruling out injectors.

Any help would be great, I am starting to think the only thing left is the valves and contemplating getting a valve job done unless someone say it could be something else. I also removed and cleaned my MAF sensor with MAF cleaner thinking it could be my MAF that got fouled up.

Truck runs rough at idle but I'm not spitting a lot of black smoke out of the exhaust in the morning when I start it up.

help me out? Please? Lol