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plenum vacuum problem

  1. Hughes Plenum Installed

    5.9L V8 Specific Topics
    I installed my new Hughes Plenum kit over the weekend. Thank you to all of you who have posted your experience with blown plenum gaskets. I would not have been able to pinpoint the issue without the help of this forum. To reiterate: Symptoms: 1. Rough idle 2. Lack of power especially while...

  2. Too Much Vacuum??

    Performance Mods - Engine - 5.9 Liter V8
    I had a problem with my tuck burning oil and poor gas mileage so I got hughes plenum kit and put it in over the weekend. After it was all said and done I fire up and and didn't have the pcv valve hooked up because i needed a new hose. But once i hooked it up the truck did not want to idle and...
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