2009 ezip trailz PAS
 

Just bought a used bike and is literally is in perfect condition but for 2 things. Looking for insight please...
1) Do I do anything to activate PAS? I believe if the battery is on and the switch is in PAS, all I do is pedal and it will pick up. I have tried the throttle but it doesn't effect it all all. There seems to be no instructions in the manual and I may just be stupid here. Any instructions?Electrically all is well but the pesky PAS is dead. I've went thru wiring and looked at the obvious, the sensor. I don't know how anything could go wrong here just a sensor and magnets. Adjusted several times, no change. Can I take a meter and see anything at the connector as I turn the pedals? Seems should have a pulse or something. Anyway, please help.
2) This one is stupid but the "shocks" are jerky, like sticking. I believe it is just a spring. I've lubed what I can but they are still not right. Any suggestions?

Thanks in advance.
JIM