With all of the screwy smptoms at once I would suggest to inspect the bundle of hard plastic vacuum lines where it runs under the battery tray on the way to the servo. Leaking battery acid corrodes the vacuum lines eventually compromising the lines allowing the system to suck the acid into the rest of the system making everything screwy. It is not a pretty scenario when this is the problem. Heck it's not a pretty scenario when that system works properly. We joke around the shop that when one doesn't work it needs the genie in the bottle replaced that made it work in the first place.