[Hozer 88GTConv]

Gents,
My wideband is calibrated and working correctly. It is mounted 20 inches behind the right 02 sensor.
My Anderson PMS is confirming the lean condition, but it's tougher since it reads the stock 02's and they bounce back and forth.
I've got the FPR cranked up to 50 psi and it's still reading 15-16:1
on the wideband readout. The Anderson is still bouncing back and forth around .46 with 50 psi. Is the A9L just adjusting the pulse width of the injector to counter the greater pressure?
I've always suspected I've been running lean.
I added some fuel to my table on the PMS and it didn't help much.
Mind you, all of this was done at idle.

With MAC flowpaths and an off-road H-pipe, could the absence of back pressure be messing up the wideband readout?

Thanks,
John