[Old Professer]

“The system used a solenoid to disable a rocker arm, preventing fuel and air from being sucked into the engine by closing the intake valve, IIRC.”

I think that would lead to bent pushrods?

[chrisser]

I think that would lead to bent pushrods?

This is from a Cadillac forum on the web. Can't vouch for its accuracy.

"Each solenoid has a short rod that, when activated, moves a disc that allows a valve actuator to move through a "window". This effectively allows the rockers to move up and down the rocker studs so that no valve movement occurs (the pushrod and pushrod end of the rockers move up and down together; the valve end of the rockers pivot on the valve tip). This causes pistons in the affected cylinders to move up and down with both valves remaining closed"