1999 F250 SD with 5.4 and 5-sp manual. With the AM radio on the miss obviously causes static and it's related to engine speed. While going down the road with no throttle there's no apparent miss and no static, give it some throttle and there's a miss that can be felt plus heard on the radio. The truck has 117k miles on it and is pretty new to me. I pulled the coil assembly off one of the front plugs but not the plug (these tritons seem to have a bad reputation regarding plug threads). Is it common for the plug and coil connection to need cleaned? What are the first things to start checking? Ignition or injectors?