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Alvin and 5FDP, you are correct, there were 2 codes: P0103 (Mass or Volume Air Flow A Circuit High), and P0332 (Knock Sensor 2 Circuit Low Bank 2).
I cleared these codes and no more knock. Although...

Yes, it is a stock cam. Only mods are long-tube headers/free flowing exhaust.
Yes, my injectors are at 98%.
Seems like time for injector upgrade.
I wouldn't think I would max them out with only...

See attached files. thanks

Hello, I am currently tuning my truck in Open Loop, Speed Density, with Wideband.
2003 1500HD 6.0 LQ4 4l80e, 3.73 gears, 33" tires.: Mods: Full Exhaust: 1 3/4" full length headers, high flow cats,...

I removed the windows update KB5006670 and its working well again. Thank You!

Does anyone know why the 3D Chart Graph is almost all black, and barely visible? Both of my computers have the same issue.
See attached pic. Thanks in advance.