Hey all, I have an 03 Expo EB 5.4 90k+ miles and its running like crap of & on, Used my ODB scanner and it showed P0354, P0355, P0356, P0358 pending a few weeks ago. Cleared the codes and checked eveything & it looked good. Well today it almost stalled out on me and lost all power and when I pulled the codes it showed P0351, P0352, P0353, P0354, P0355, P0356, P0357, P0358 pending, turned the truck off & it started right back up no problems and drove the rest of the way home fine. I know the codes are feedback failure from the COP's but what can cause this randomly like it is. Thanks for the help

 

The coils have a common +12v wire. The second side of each coil runs to the PCM for ground. Since they all share the +12v, I would suspect an intermittent loss of power on that wire. This could be as simple as the fuse not making a good connection. I'm not sure which fuse feeds the coils, but I do believe it's a 30 amp one.