Engine misfire troublshooting

[Kudzupatch]

Originally Posted by ChevyTech

This is a sign that the engine has a mechanical knock and the system is pulling timing.....

Thanks. That makes sense and had crossed my mind but I had forgotten about it. I don't hear anything but I realize I might not hear it.

I just drove to town to pick up some lumber and the stumble is MUCH worse. Also seemed down on power which would to line up. I am going to bump it back up to 4 degrees for now to improve the driveability.

I will go ahead and order a cable and get TunerPro installed and go from there.