Quote:
Originally Posted by jdulle
You could also buy one of those hand pump vacuum testers, perhaps a vacuum line is bad, or slipped off somewhere. You can hook it into the system, create vacuum, and listen or test various components/lines/etc to see how quickly they lose pressure.
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and Vstech has the best advice. DO NOT START THE ENGINE!
I've never heard of a vac leak so extreme as to cause brakes to fail but I'd still run a check on the system before I pulled the pump.
Imo, vac pumps should be replaced or rebuilt before they fail.