vacuum leak

  1. B

    Of fan clutches and mileage

    I have read all I can find on fan clutches, and I am still a little stuck. Been doing a lot of deferred maintenance over the last year (TLDR is/was my elderly father's, but now I drive it). I noticed a precipitous drop in fuel mileage after changing out the water pump and fan clutch (severe...
    • bcja
    • Thread
    • exhaust manifold fan clutch fuel economy fuel trim oxygen sensor roaring noise severe duty vacuum leak
    • Replies: 63
    • Forum: General Discussions
  2. R

    Engine performance

    So i have a 99 5.9 and i replaced my valve cover gaskets, since then it has not ran right. i have an exhaust leak where the exhaust pipe meets the manifold not sure if that could be contributing or not but i have changed the pcv valve and checked high and low for vacuum leaks, though i have not...
  3. MarkMac77

    Two Days Under the ‘01 For Clutch Replacement NV3500

    So driving home from a trip to the mountains last week, I went to downshift and the transmission went *BANG* and the clutch pedal fell lifelessly to the floorboard. A quick look under the truck revealed that the throwout bearing left the chat in dramatic fashion. The parts counter guy asked...

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