V10 no start when hot

So I'm almost able to drive my 2006 V10 after a year, but I cannot get the engine to start after the coolant gets up to temp. When the engine is cold, or slightly warm, I can kill it and it will start right back up. When it's up to temp, if I kill it and immediately try to restart, it just cranks. I'm reaching the end of my ideas to figure this out. Here is what I've done so far to try to change this:

Fresh fuel
Removed and cleaned fuel pumps/filters, new fuel filter
Hardwired fuel pump to run continuously
Added jumper cables to another running engine to add starting power
Released pressure in coolant system
Opened PCV to atmosphere
Removed coolant temp connector
Removed coolant return temp connector
Opened ECU to check for corrosion: appears all intact, no areas of damage or corrosion
Checked all fuses and relays

Currently, cam position sensor is still reading "signal out of range", so signal return wire has been removed from ECU wire harness. This leaves "no signal" fault.
Also, Steering Angle sensor is not working despite all wires being intact and voltages present, leading to steering and steering wheel electronics faults.
Batteries and related grounds are in good condition, with batteries being kept on a charger/tender.
I'm also posting before and after scans of the hot no-start, as well as video of it cranking while hot.
If I can solve this, I'll finally be able to drive this beast on a regular basis.