Elm327 meh. I was unable to program a rcm in a 11 fusion used vcm2 clone programmed another rcm no issues. For the pcm reprogram u are gonna need 2 keys.
2003 F350 with 6.0. I was cruising down the road when the engine died. Will not crank over. Fuse #22 is blown. Replaced it and it blew again as soon as the key was turned on. I pulled all the relays out, replaced #22 fuse, turned the key on. Inserted one relay at a time until the fuse blew: relay #302 = PCM.