Timing

[ynot]

I've had the power Los code on both my trucks after downloading a tune, after the download is done an it says successful turn the key off for 5-10secs an let the ecm reset then hit the ok button in Cpern an let it reconnect that always turns the code off for me. An once the codes are cleared they stay cleared.

The usb disconnecting again seems normal too me happens all the time especially driving down the road I think it's from the laptop bouncing away jostling the usb cable.

Your timing concerns are harder too nail down with out checking the injection timing too see why they used a 4.5 degree wedge which is used too advance injection, in quick serve in the service manual if you search wedge the first result explain how do do it. Finding someone with the tools is the problem