PW1 not same as PW2

[Xman]

I have a 03 GM truck with a custom OS 03190003, forged 5.7, Maggie with 11 psi boost,

The tune is SD no MAF.

I had a decent tune with AFR's 14.5 for idle, part throttle. Now the PW and of course the Duty cycle varies from bank 1 to 2.

Example: Idle .. DC1 = 2 DC2=3
2000rpm DC1= 4 DC2=6

AFR bank 1 stays in the 14's and bank 2 is 10-12, Major issue, It gets worse as the rpm/load increases.

Any idea on how to attack this problem.

[joecar]

Try swapping the O2 sensors left-to-right.

[Xman]

I should have mentioned:

This is SD, OL, No MAF, no trims.
B4205 = 140C
B3801=disable
B4108=disable
MAF unpluged

[5.7ute]

Swap injectors left to right bank & see if the problem follows. If it does the best fix would be to get the injectors flow matched.
FWIW the only time the IBPW or IDC is different from bank to bank is if fuel trims are active. Reset the fuel trims with the scan tool & relog. If the trims are active you are still in closed loop. Also make sure with a custom OS that you are not commanding stoich anywhere in B3647 or STFT will be active in those cells.

[Xman]

I have B3647 at stoich. I will change and then reset trims.

thanks