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  1. D

    ESOF question

    Sorry I ment the inverse of presure, anyway, hubs are good, I can hook vacuum pump directly to the output of the 4wd seleniod and it holds at 16 on the vacuum gauge. I can hook the pump up normally, blocking off where it comes out of the vacuum resevior goin to the 4wd selenoid, just utilizing...
  2. D

    ESOF question

    Does anyone know what pressure should be comming off the 12v vaccuum pump? Mine won't stop running, if I assist it in pulling a vaccuum on the resevoir it'll hold and shut off. But other than that it runs continously without providing enough for the hubs/vent selections 2001 7.3 F-250 4...
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