5.9 v8

  1. 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...
  2. xevrek

    96 5.9 v8 4x4 no spark

    So I’ve been hunting down this problem for awhile now and I’ve come up short. My truck just lost spark out of nowhere and I’ve replaced everything that I could think of coil, plugs, wires, dizzy cap, rotor, camshaft sensor, crankshaft sensor. Am I missing anything
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