twist the rotor into the spring tension (CW) & let loose of it & see if it snaps back sharply
Robert turns out my distributor was trash. The grease was hardened, the weights and springs were rusted. The weights/springs do not snap back after extended, they return erratically, getting caught up on old grease and rust and sometimes cant even make it back to their fully rested position.
If I had a blast cabinet I'd probably disassemble and clean/regrease. But I dont so I ordered a cheap A1 Cardone reman distributor and with re-install my Pertronix back into that.