Starts every morning but once it hits a certain temp it dies and won't restart

OWNER: V-6 ? If so, check the foil-covered wiring harness between the block-mounted rear crank sensor to the ignition module, pull it out & open it, you may find the wire insulation has failed allowing these two wires to touch, if so; there-in lies the problem, we have found and repaired several of these.

Did you change the fuel filter when you did pump