I have the same problem.
My first start of the day is quick, the car runs great for about 10 minutes. After that it starts to miss and hesitate from a stoplight. The warm stars are hirrible and take 3-5 seconds to start the car, it seems fuel starved. I can not use my A/C because when I stop and try to pull off, my car will hesitate to the point of almost shutting off.
I am lost to why my car does this.
1987 mercedes 300E
1995 e320 conversion(hated the 300e grill)
Monochromatic Paint (Custom Blue)
Flat Badged (front)
custom "carbon fiber" console
18 inch HP EVO rims
Sold! Now I drive a Monte Carlo SS