Hey there. Background 07 f250 6.0 pulling codes p0672-3-4-6-8. In the last 20k miles I've rebuilt the FICM and transmission temp sensor. She's been running alright except for hard cold start. The other day I was warming her up and heard a jingling like a belt pulley or something the like was off and went to touch the accelerator to see if the sound was directly driven or a throwout or the like and she died. Hasn't even puffed since then. It will crank now but not fire. I tested all the glow plugs and #3 was bad but the rest checked out at .7ish through the top 4 pin connectors. Cool, GPCM and a glow plug... off to autozone. Installed them and still crank no start. Wiring between GPCM and the harness check out resistance wise.. what is the next probing step? Help!