Join Date: Sep 2011
Location: Breslau, Ontario
Older post, but that's a injector. Mine did the same thing. It was worse when cold and under load. I showed no codes. Had it tested at Ford (only they can test) it showed 1 bad and 1 weak had then changed out and all was good. Fuel pressure is important for injectors to survive. Ford makes a upgraded fuel pressure spring.
The cold start sounds like a FICM. You can check voltage with a voltmeter or a Scangauge II with the proper X gauge.
2005 F250 SCSB 4x4
-ARP studs, PowerMax turbo, Custom tuned SCT, Accufab intake elbow, Coolant filter, Oil bypass filter, Autometers and Scangauge, Zoodad + fast idle mods, Gogo direct solenoid, 4" turbo back MagnaFlow duals,2.5 levelling kit, Air bag helpers, Cowl hood, 7.5` Arctic plow