Vacuum line comes off when car is shut off
The vacuum line for the brake booster keeps coming off every time the car is
shut off. It's a tight fit and there is vacuum at the port when it's running, just
blows off when the car is turned off. Any ideas?
If there is a backfire, that will put brief pressure on the intake manifold where there is normally vacuum. That might be what's blowing the hose off. I would just clamp that hose on, even if there seems to be a tight fit. I had a vacuum line that runs the cruise control coming off because it was old and stretched. A clamp fixed it.