Bought the truck with a fresh 4.5" lift wheels and tires. That's where the old owner stopped. I took it from there. I am replacing the front and rear with winch bumpers from Iron Cross next, Torsion and lateral bars after that.
Here's my observations of the problem:
Always starts when cold.
No related engine codes (occasionally throws low catalyst effiency after a restart).
Will start from cold and idle 15-20 minutes, then dies. Will restart right away and then die about 5 minutes later. Then restarts...