how can you tell if one rotor is not firing?
can a rotary engine run on only 1 rotor?

 

I had a rotor go out on an '87 and it was barely driveable. For one the car wouldn't stay running unless I put it in neutral and revved the engine constantly. It has so little power that I couldn't even go fast enough to get through a green light when I was the first person in line. So really it's not too hard to tell that one is out and no, it's not driveable.

In my opinion anyway.

 

Flobb(?) is right,will not idle,no power,shakes like a washing machine,practically impossible to start......