Yeah looking up symptoms of different things a bad ignitor would make the car die completely and it seems they work when cold and not when hot. So rule that out. Bad coil though its either it won't start but if its failing it will make it run sluggish and rough. Maybe thats it but it is odd its only full throttle and from 4,000 RPM and up. I heard there is a way to test it using resistance. But IDK where you would get the resistance specs of it. I think the best bet might be to find an OBD2 B series VTEC distributor and completely swap out dizzy's. If that doesnt solve it then it has to be the slight crush in the fuel line?