The car runs fine until it gets up to operating temp and then if you come to a complete stop it will either hesitate and then take off with a big puff of black smoke or stall and start hard with lots of black smoke, I dunno what else to check!?!? Please help!

1983 528e auto trans.
New NGK plugs & wires
New o2 sensor
New coolant temp. sensor
New air filter
Throughly cleaned intake manifold, TB, ICV, and air box/filter
Checked/cleaned/siliconed all relays and electrical plugs and connections under the hood

Either this forum is dead or no one actually works on there own cars.

Maybe a cold start injector that is stuck wide open? Does it have hot starting problems? You could shut the car off hot and immediately take out the cold start injector and see if fuel is coming out, none should be at all.
Fuel pressure too high? You should def check that, if its too high try a presure regulator. I dont remember the spec, maybe 2.5-3.0 bar?