Today i had a stumper. I started an 04 F550 manual trans, and to my surprise i had no throttle pedal. Finally after a few key starts i was feathering the pedal and some black smoke started puffing out and my throttle started comming back; drove it and it was fine. checked codes...none found....self test..,and nada. KOER self test, nothing. Kinda stumped. I check PIDS for FICM and found FICM_Volts fine...12V, 48V, and 12V. So I let the truck sit for a while thinking this was a fluke, and tried restart after lunch, SAME thing, and still no codes. I'm not sure what direction to go in, please if anyone has had this happen, let me know....Also monitored BARO, MAP, and EBP_Absolute and was all in the 14.5 range. Thanks