Got your MSQ. Now some questions:

1. Your VE table only goes up to 100 kpa. You mentioned that you are turbo'ed, so where is the rest of your map?

2. Idled like crap - what do you have for idle control? Stepper control via MSII? You have On/Off valve selected in your Idle Control settings, which does not apply to the 420a IAC.

3. Your AFR table needs adjustment. Again it only goes up to 100 kpa. Some spots of the AFR map are very lean, and since you have EGO control on, it is going to pull your VE buckets to the lean side.

4. Ignition table only goes to 100 kpa. All three of your tables need at least a base tune to your maximum boost level, otherwise it is going to be dangerous to operate your engine about 100 kpa as the tables have no values. Boom!

5. High or Low Impedance injectors? Your injector characteristics, specifically the PWM settings are not correct for low impedance.

Sort out these basic settings before even attempting to drive the vehicle. Also your WBO2 should only be in the range of 0 to 5 volts. You mentioned something about 10.5 volts? You mean 10.5:1 AFR? Have you calibrated the sensor values and burned them to the MSII? Under TOOLS, select CALIBRATE AFR TABLE, and select the sensor you have. Then click WRITE TO CONTROLLER, if you have not performed the above.

Again much of this is covered under the basic settings here: http://msextra.com/doc/ms2extra/MS2-Extra_Tuning_Manual.html

Just viewed your log file. Your wideband is not setup correctly. Follow the instructions in the msextra manual to set it up. Next, based on your injector size (1200) and the pulse widths I am seeing in the log file, you are running way rich. Your fuel table is for stock sized injectors. You need to find a base msq with similar injectors or scale the whole map down to where your WBO2 readings are near stoich.

Your CLT and IAT sensors - are they the GM sensors or are you using stock 2GNT sensors. If they are 2GNT sensors, have you re-calibrated the appropriate files? The temperatures seem very low - was the ambient temperature during the time of the log around 40*F?

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2012 2500HD LML