someone please help I have a 87 turbocoupe that will not run correctly,runs ok when cold or the computer is reset but when it warms up it runs horrible when it starts to boost the whole car starts to shake back and forth (also see black smoke sometimes} even does it when you push down on the gas seems to me like an ignition problem(only under load) also after being warmed up it has an eratic miss while idling one time it idled so bad, it was barley running (lots of black smoke and idled like it had a big cam) i have swaped vam meter, ecu, distributer tps sensor, new plugs wires cap and rotor(autolite) coil please help new to turbo stuff used to the 5.0 stuff thanks