Stall when above 80 degrees outside air temperature

[K L Maxey]

2014 NV200    91,000 miles. When the outside air temperature is above 80 Degrees the van stalls when trying to accelerate from a stop.  It only does it when it is operating temperature and the outside air temperature is above 80.  Started last summer and got progressively worse. The only hot day we have had in Virginia this year it is even worse. Stumbles and stalls when starting from a stop or accelerating after letting off the gas pedal. Such as going down a hill then accelerating to go up the next one.

The only code that has shown up indicated the crankshaft position sensor.    The local Nissan dealer is unable to duplicate the problem due to the cooler weather lately.

I have replaced the Crankshaft position sensor, camshaft position sensor, mass air flow sensor and the accelerator pedal. I starts up after stalling and once you get to highway speed it does ok until you stop or have a large change in the accelerator pedal. Any help is appreciated.