85' BMW 325e misfire and hestitation

When my car warm up in the morning it idles fine no misfire what so ever but once my car is warm it start misfiring. When I start driving it hestitate sometimes during acceleration. When my car is fully warm it don't misfire and hestitate as much. My misfire got a lot worse once I change out the O2 since then I changed out my thermo time switch, temperature sensor (white tip), temp sensor for for my guage throttle position sensor map sensor cold start valve, fuel injectors, fuel pressure regulator, spark plug wires, spark plugs, distibutor cap and rotor button and even the coil. The only thing on the thermostat housing I haven't change is the thermostat and the temp switch. Right now I'm pretty much at a total brain lock to what it could be and I even did the valve lash if that's any constallation. Please someone give me some kind of idea to what it could be because this problem has been whooping my brain for over three years and the so far the car is winning. Help Please oh yeah I even changed the idle control valve