VACUUM Issues???
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VACUUM Issues???
I have a 2004 E350 6.0. We have braking problems that I think might be vacuum related. The pedal is very hard to press and the truck slows to a stop but you have to really stomp on the brake to stop. I checked the pads and they look like new (almost), I then thought I have a master problem so I replaced that but the same hard pedal problem. How can I troubleshoot the vacuum pump? Mine is engine mounted and driven by the belt. What vacuum should I expect to see?
Thanks for any suggestions or help.
Thanks for any suggestions or help.
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Joined: Aug 2016
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Yes the E series is definitely vacuum assist. There is a can behind the master with a vacuum hose and check valve attached. The main vacuum hose comes up from the pump deep down in the bowels of the engine and is distributed through a manifold attached to the cowl. I can feel vacuum at the manifold but don't know what the reading should be.
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