Well, I changed the FPDM with a new Doorman unit with the stand offs, but I still had the problem of rough idle and misses after a car wash, so I used a spray bottle and sprayed the first COP on the passenger side and sure enough, it started rumbling and missing. So I blew out the cavity with compressed air, removed the coil pack and the spark plug, changed it with a new Motorcraft SP-515 plug, new boot and spring, greased it up, tested the COP for primary and secondary resistance, and put everything back together. Fired right up and no more missing!
2004 SCAB 6.5 RWD 304k Tow Beast
New 5.4 engine, 3 Speed Electric Fan Conversion w/ Painless F5, ScanGauge II, RAS, Monroe Load Assist shocks & AirRide 5k bags, Gibson Exhaust system, Equal-i-zer 10k 4 point sway/weight dist., Curt progressive brake controller, Powerstroke 6.0 31 row transmission cooler & external filter