Ya I was think wheel bearings too but it's not making any other signs like most do...(excessive noise at all rpms/mphs..and I have no play in the wheels).
Im still on the brakes honestly, I've noticed that when my pedal gets stiff the car starts this bullshit. So the other day when it started, I pulled over and popped the hood. Pulled the line off the booster and plugged it back in. Brakes went back to normal. I know there's a external check valve on the firewall above the booster and I blew threw that and it works. My question is there another check valve internally in the booster?
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