Hey 94rt, how's everything going? I can honestly say I am puzzled, because after changing my plug wires in hopes of clearing my # 4 cyl miss I continued with the same problem. I cleared the code but it came back, and I also checked the plug after driving it for a long period and it still looked coated in gunk, then a weird thing happened because a week later the check engine light cleared itself and the #4 cylinder miss is gone. Although my truck runs good again I am still puzzled to what the cause of this problem was. Thanks again for the info, your help is always appreciated.