{"id":3711,"date":"2017-02-08T15:29:48","date_gmt":"2017-02-08T22:29:48","guid":{"rendered":"http:\/\/minniebiz.com\/gmcmotorhome\/?p=3711"},"modified":"2017-02-08T20:20:43","modified_gmt":"2017-02-09T03:20:43","slug":"auxillary-vacuum-pump-installation-and-test-and-fitech-test-drive","status":"publish","type":"post","link":"http:\/\/minniebiz.com\/gmcmotorhome\/2017\/02\/08\/auxillary-vacuum-pump-installation-and-test-and-fitech-test-drive\/","title":{"rendered":"Auxillary Vacuum Pump Installation and Test and FiTech Test Drive"},"content":{"rendered":"

February 8, 2017<\/p>\n

Dave Lenzi’s vacuum switch arrived today so I installed and adjusted it. It is set to Dave’s instructions to turn on at about 16 inches of mercury and turn off at 18 inches. It all works but I don’t think I like the switch range because each time I use the brakes the vacuum pump turns on because the engine only produces about 15 inches at idle. I will email Dave and ask about turning it down a little. The one note is that I had to get a booster check valve and disable it in order to get a good tight connection to the booster. My straight 3\/8″ to 1\/2″ adapter leaked because it was designed for hose rather than the grommet that holds it in the booster’s opening.<\/p>\n

I took the coach for another test drive after getting the vacuum pump working and it ran good. Not perfect yet but getting close assuming that the FiTech unit is actually “learning”.<\/p>\n

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February 8, 2017 Dave Lenzi’s vacuum switch arrived today so I installed and adjusted it. It is set to Dave’s instructions to turn on at about 16 inches of mercury and turn off at 18 inches. It all works but I don’t think I like the switch range because each time I use the brakes […]<\/p>\n

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