I suspect that I have 2 stuck injectors.
Idle/off idle miss that clears up at cruise
Cyl 7/8 have sooty plugs... At idle If I disconnect the Injector leads to the cylinders in question the motor RPM does not drop. The injector wiring is functioning properly and is "firing" but fuel is flowing even when the injector is unplugged.
Anyone have ideas or think I'm on the right track? Can they be cleaned at home... should I send them out or just buy new?

Looking for Opinions

Thx