Another CAT-tastrophe...6nz cutting out after start up

Hello again, everyone. Ok, so I posted before about my 6nz cutting out after start up. Basically, it fires up just fine, runs for a few seconds, cuts out, then right before it dies completely it catches itself and runs great. No codes. I've checked the fuel pressure, wiring, everything. I've replaced the ignition, cam, crank, water, manifold, oil, fuel, intake temp sensors as well as the injector harness and the harness from the sensors to the ECM. Also put on a new fuel pump. Ran a new power wire to the ecm with an in line fuse. The other day I put one of my drivers in it and sent him on his way. He got 5 miles down the road, the truck died. He restarted it and it died again. We couldn't keep it running for more than 10 seconds. No codes, all gauges read normal. Got a new ECM, had it programmed and put it on. Truck fired right up. Drove it around, let it run for 90 minutes or so. Perfect. Parked it, lubed it and put steer brakes on it. Fired it up again, ran for a few seconds and stumbled again just like it did before. It didn't completely shut off, but obviously there is still a gremlin in this #### thing....

 

I've had the dash completely torn down. Checked starter wires, grounds, etc. Not saying I couldn't have missed something.

 

Every line except the return on the back of the head is new. Fuel pressure is good too.

 

Well I started it and grabbed and pulled and shook and wiggled every wire I can see under that hood and I haven't found a thing. Never made it stutter or anything.