I have only looked at the first data log posted in this thread. It seems odd to me the engine would be running rich with only one injector working.

Perhaps a quick timing light test of unplugging one injector at a time would be a worthwhile experiment?
Ignition key off ... unplug one injector ... start the engine and check spray pattern with timing light ... repeat test on other injector.

Seems one of the logical outcomes of the above test might be . . . if one injector is not working ... the engine won't start?

Sawtooth knock pattern, possibly measure the resistance of the knock sensor. Remove the electrical connector from the knock sensor and measure from where the were the electrical connector was plugged into (center of knock sensor) to ground.

dave w