Follow along with lead instructor, Jeff Evans, as he walks you through how the catalyst protection and torque based rev limiter control works on the GM Gen 4 ECMs. We take a specific look at programming a throttle based torque rev limiter and using the VCM scanner to monitor things.

Follow along with lead instructor, Jeff Evans, as he walks you through how the transient fuel works on the GM Gen 4 ECMs. We take a specific look at programming manifold volume and transient fuel tables such as impact factor and evap factor to see the cause/effect on fuel calculations using the ...

Follow along with lead instructor, Jeff Evans, as he walks you through the main spark timing tables used in a GM Gen 4 ECM. We explore logging spark timing within the VCM scanner in order to expose if the high octane or low octane spark timing table is being sourced during operation.

Follow along with lead instructor, Jeff Evans, as he walks you through the spark timing modifiers such as PE/COT, IAT, ECT, EGR, and many others. We take an in-depth look at exposing the spark timing modifiers in our VCM scanner software to understand where the spark timing is coming from while ...

Follow along with lead instructor, Jeff Evans, as he walks you through the idle control tables and routine used in a GM Gen 4 ECM.

Follow along with lead instructor, Jeff Evans, as he walks you through what tables need to be modified and values that need to be changed in the calibration file for proper idle control over a variety of different cam profiles. We also explore configuring various logging channels within the VCM ...

Follow along with lead instructor, Jeff Evans, as he walks you through the advanced idle tuning technique on a GM Gen 4 vehicle using HP Tuners to properly tune the idle base spark and airflow final minimum values.

Follow along with lead instructor, Jeff Evans, as he walks you through tuning with the knock control strategy within the GM Gen 4 ECMs. We take a specific look at utilizing the VCM scanner to build custom histograms to review knock data and tune spark timing.

Follow along with lead instructor, Jeff Evans, as he walks you through tuning with the variable cam control (VVT) within the GM Gen 4 ECMs on L92 and L99 engines. We take a specific look at utilizing the VCM scanner to build custom histograms to review VVT tuning and optimization.

Follow along with lead instructor, Jeff Evans, as he walks you through tuning with the Virtual Torque tables within the GM Gen 4 ECMs. We take a specific look at utilizing the VCM scanner to build custom histograms to properly repopulate the Virtual Torque tables with corrected delivered torque ...

Follow along with lead instructor, Jeff Evans, as he walks you through tuning with engine side of Torque Management within the GM Gen 4 ECMs. We take a specific look at how we can utilize the torque management to limit torque production in the lower gears to aid a traction limited vehicle to acc...

Follow along with lead instructor, Jeff Evans, as he walks you through tuning the automatic transmission shift scheduling (rpm) in the GM Gen 4 ECMs for 6L80/6L90e transmissions. We take a look at the cause/effect of programming the tables using the VCM Editor and VCM Scanner software to achieve...

Follow along with lead instructor, Jeff Evans, as he walks you through how to properly tune the TCM when upgrading your torque converter. We take a specific look at torque converter pressure control to achieve instant lock-up so you don't damage the torque converter, as well as how to properly p...

Follow along with lead instructor, Jeff Evans, as he walks you through how to properly tune the TCM shift pressure, shift timing, and torque management for lightening fast full throttle shifting on your GM Gen IV vehicle.

Follow along with lead instructor, Jeff Evans, as he walks you through how to properly tune the fuel pump control module to achieve higher fuel pressure and flow from the fuel pump.

Follow along with lead instructor, Jeff Evans, as he walks you through tuning with a ZL1 & CTSV vehicles. We look at how to properly disable the factory boost control and boost cut to prevent odd WOT performance along with spark timing recommendations for starting the tuning process.

HP Tuners GM Gen 4 Training Part 39: EQ Ratio Error walks you through working with units of lambda for air/fuel measurement within the VCM scanner software. We take a look at how to use EQ ratio error within the histograms to properly tune MAF or VE fuel tables.

HP Tuners GM Gen 4 Training Part 40: Injector Timing Calculator walks you through utilizing a custom injection timing excel calculator to program the proper end of injection programming in a GM Gen IV application.

HP Tuners GM Gen 4 Training Part 41: Flex Fuel Tuning walks you through the two different flex fuel tuning options within the Gen 4 ECM programming. We explore how to properly configured and tune the flex fuel feature as well as reviewing data in VCM scanner from a flex fuel based vehicle.

HP Tuners GM Gen 4 Training Part 42: O2 Switching Voltages walks you through how the o2 sensor switching voltages affect the closed-loop fuel correction within the Gen 4 ECMs. We explore how to properly dial in the switching voltages to get a desired AFR while in closed-loop operation.

HP Tuners GM Gen 4 Training Part 43: Proportional / Integral O2 Gains walks you through how the closed-loop correction is driven from PID gain factors. We discuss what changes to make to the proportional and integral gains when long tube headers are installed as well as reviewing a data log of w...

HP Tuners GM Gen 4 Training Part 44: VCM Scanner Filters walks you through how to integrate filters into the histograms within the VCM scanner software. We explore how to validate that the PID values are called on correctly for the filters to be implemented properly.

HP Tuners GM Gen 4 Training Part 45: Hybrid MAF / SD Tuning Intro explores how to calibrate both MAF and SD based airflow models within the Gen 4 ECM at the same time. This new calibration method will save tremendous amounts of time and improve the transient throttle conditions / automatic trans...

HP Tuners GM Gen 4 Training Part 46: Hybrid MAF / SD Tuning Demo walks you through the process on how to simultaneously dial in the MAF and SD airflow models together.