Tried swapping cyl5 and cyc2 plugs and coils, still the same high knock on cyl 5 during wot pull in 3rd gear. Swapped cyl5 and cyl2 injectors with new seals and gaskets. Re-coded injectors. But still getting knocking on cyl 5 during 3rd gear wot pull. What else could be causing the knock? Do I need step 2 colder plugs instead of 1 step? Is my fuel rail crashing with E30? Is there a valve or other cylinder issue on 5? Good news is looks like still no injector leaking as AFRs go straight to max value and don't dance around anymore.