I'm having a pisser of a problem, When flying my 4 engine Dash, I'm fine right up til I decide to control just one engine, if I push E -4, for the engine #4,or any other engine, I am forever stuck with being only able to control engine # 1. nothing I do helps. I push E 1234, but still I have control of just #1 engine. It pissed me off so bad I buried the damn plane in the ground from 8500' just north of Parkersgurg WV. What the hell gives here?! I've had this problem before with the 747.
Im not sure there is anything you can do about this,may be a bug.
If you use a joystick to control the throttle and then use the keyboard,you will only have the one engine
The only way I know is to pause the sim and select the aircraft again.Not good,but it works