TOP END REFINISHING

[mike100]

Originally Posted by Schrade

I'm lost. Again.

If a vacuum solenoid - EGR, ZR1 secondaries, etc., is in the vent position, ...

then it vents the actuator diaphragms to the atmosphere speeding up their closing. You should be able to vacuum charge the little black can reservoir at that point. You may have to apply 12v to get the vacuum to pass to the secondaries- I'm away from my FSM's at the moment, but that is the testing path i would take.