But, but, our brakes are not vacuum operated at all. Out break booster is electric!Side note: While we working on the last of the plugs/coils, we found that the hose for the PCV valve on the driver-side valve cover was cracked and leaking at both ends. I feel like once we replaced that, the idle smoothed out AND my brakes stopped doing that thing I reported on earlier where I needed to pump once to get full effect on the pedal feel. That seems to have gone away so I THINK it was just a vacuum leak.