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p0300

  1. 7th Gen Engine Performance
    Hey y’all, I keep getting a p0300 code on my 2005 3.8. This is a random/multiple misfire, no specific cylinder codes. Replaced spark plugs and wires (all needed to be replaced anyway) tested each ignition coil and the ignition control module, all of those work fine. Also did an electronics test...
  2. 8th Gen Engine Performance
    I have the good ol 3.5 and I'm Getting heavy missfire counts from cylinder 5 and 6 and a couple from 1 and 4. I've changed all the injectors and put new plugs on 5 and 6 to see if it fixed the problem.. it didnt. All wires are new. Intake manifold gaskets are new......I'm at a loss here. It...
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