New injectors responded the same. Or no change which ever way you look at it. The compression test looked very good. Three cyl are running max rich one is only very rich. No motor problems as far as pistons rods and crank.

The interesting thing is that the left bank was originally rich. New O2 and Cat and it switched to the right bank. New O2 and Cat there made no difference. Been that way ever since.

I’m simply lost in the daylight over this car and it’s systems.