99 e150 stillhesitating and stalling at acceleration

so far i've changed mass air flow sensor,crank position sensor, fuel filter, wires, plugs, ignition coil, and van continues to hesitate and buck during acceleration. in the morning it stalls completely when it's put into drive. after driving for half hour or so it runs perfect. any ideas?

I would ohm the temperature sensor if your scanner won't read this for you.
http://fordfuelinjection.com/?p=28 The link will give some readings.

I would ohm the temperature sensor if your scanner won't read this for you.
http://fordfuelinjection.com/?p=28 The link will give some readings.

I agree with that because if the temp sensor is faulty it will run the engine too rich and stall (too much gas )

I agree with that because if the temp sensor is faulty it will run the engine too rich and stall (too much gas )
My van is doing the same. I was told after a code read it is most likely the egr solenoid.

My van is doing the same. I was told after a code read it is most likely the egr solenoid.
Normally an EGR valve will cause stalling when the engine is warm not when it is cold.