Optical leveling sensors, they can be checked using a single piece of white paper....single layer should not trigger the sensor, double should trigger the sensor.
Keep the selector spring tension on the bottom of the car at 21 inches.
CS up at the floor, suck push button.
Watch the contact in the IBM relays, U,UA,UX ect, relays that are used on every run. The contacts will turn and drop down on the back contacts.
Green ground jumper on rectifier should not be removed, always secure to controller.
Check Dash Pot oil.
