Pez
Here is what I have in my notes for epoch.
Check POS16 and make sure the car position is hitting the target.
Compare POS16 to AVP16 count. Should be within 4
Check your PE2 boards, you may have a dead zone.
If your confident they are 100%, try adjusting the acceleration feed back board potentiometer MGI R9 ( no more then 2 turns ).
Check your negative feedback
Try changing out MGI or MGA.