Adam Ferguson

This is your truck dummy. The OP is your dad.

Thank you for the replies. I hold off on o2 and check the harness.

So I had my Trans rebuilt. When the builder test drove it after rebuild he left a o2 bank 2 sensor unplugged. He Drove it for a few miles before truck stared running bad, idling bad, smoking and threw p0300 misfire code. I think this was because it ran really rich because of the missing o2 on one side. We have changed the plugs they were wet as can be. It idles better but still smokes and low on power. Still has p0300. Next steps are to change all four o2 sensors. I think I might have to replace the catalytic converters as well due to over fueling. I think this is the power issue.  Question is anyone ever experience this or feel like it could be something else?

Did you ever find out what the issue was?