I am fairly new to Tuning GM trucks, and have only been using hpt since march. With that said i am trying tune a 2002 Chevy 2500 LQ4 6.0 4L80 2wd.
Mods to the Truck:
Trick Flow CNC 225 Heads
Brian Tooley Cam: LS1/2 Stage III Cam 231/242 .617"/.592" 112+2
Holley High Ram Intake and Fuel Rails.
Holley 105mm TB
Injector Dynamics ID850 injectors.
Return Style Fuel with Regulator.
Jakes Stage II 4l80E w/~32-3400 Stall
Built 14 bolt Rear with 4.56 Gears.
Truck was tuned by 2 other people prior to me and also prior to the intake and injector changes. I have adjusted all the Fuel injector changes, MAP sensor Changes and TB Changes. Truck Idles fine and Drives good just doesnt make the power it should and i am lost on how or where to go from here. I have gone thru the Tuning School Books on GM GenIII and GenIV. Problem i am having is i cannot get any fuel trims, LTFT or STFT, to give me any data other than 0.00
I have tried changing a few things and still get no differences. I also have gone and done the reset LTFT and still do not get any data.
Here is my latest tune and scan file from driving around trying to get lots of cell hits. I also logged AFR Commanded vs VE and Wideband vs VE. Wideband is installed into Bank 2 Sensor 1 Location, B2S1 O2 is unhooked (is this causing a problem?).
Any advice or help will be greatly appreciated.