Where does the vacuum go when the key is turned off?
Where does the vacuum go when the key is turned off? The vacuum then goes back to your ignition key assembly under the dash and back out to the shut-off valve on the back of your injection pump. When you turn your key OFF vacuum is routed through the back of the switch and on to the shutoff valve. What happens when you turn off the key on a car? 1) Car will start but the engine will keep running when the key is turned off. I have to remove the fuse to the fuel pump to stop the engine....