What could cause a 2006 Nissan Frontier to not start aft warming up?

What is your question?

What would cause a 2006 Nissan Frontier, Crew Cab 4.0 V6 to not start after it has warmed up? When it is cold it starts up fine. After it has warmed up and shut off it will not start without applying ether. Since this issue occurred we have replaced the camshaft, crankshaft, and fuel pump. We have also cut off the catalytic converter. What else should we be looking at? Thanks!

What makes this problem better or worse?

Heating up

How long has your 2006 Nissan Frontier had this problem?

a month or so