A Beginner’s Guide to VCM Scanner and VCM Editor
HP Tuners can be overwhelming when you first open VCM Scanner or VCM Editor. This beginner-friendly guide explains the most important HP Tuners terms, tables and parameters so you can better understand what you’re seeing before you start tuning.
HP Tuners Troubleshooting Guide: Misfires, Vacuum Leaks & Bank-to-Bank Fuel Trims
Before changing a tune to correct fuel trims, misfires or bank-to-bank differences, make sure the problem is actually calibration related. This guide covers common mechanical problems, O2 sensor clues, misfire counts, vacuum leaks and exhaust leaks that can easily be mistaken for tuning issues.
HP Tuners Gen 5 Torque Model Tuning: Virtual Torque, Peak Torque & Driver Demand Explained
The Torque Model is the biggest difference in the previous generation controllers. With just a few adjustments these vehicles will run great!
HP Tuners Gen 5 Start of Injection (SOI): Why Injection Timing Matters
Learn how Start of Injection (SOI) works on GM Gen 5 direct-injected engines, why camshafts and increased airflow can change SOI requirements, and why advancing injection timing can improve mixture preparation and combustion.
HP Tuners Cammed LS/LT Idle Tuning: Base Running Airflow & Idle Speed Guide
truggling to get a cammed LS or LT engine to idle correctly? Use these starting points for Base Running Airflow, idle RPM, and idle spark when tuning Gen 3, Gen 4, and Gen 5 GM engines with HP Tuners.
GM Gen 5 LT Tuning: What Is LSPI & How Do You Prevent It?
Learn what Low-Speed Pre-Ignition (LSPI) is, why GM Gen 5 LT direct-injected engines can be susceptible to it, what causes it, and how proper oil control, PCV function, engine operation, and tuning practices can help reduce the risk.
HP Tuners EQ Ratio Guide: Recommended WOT Fueling for LS & LT Engines
Not sure what EQ ratio to command at WOT? This guide covers starting-point EQ ratios for naturally aspirated and boosted Gen 3, Gen 4, and Gen 5 GM LS/LT combinations, plus what to monitor when dialing in Power Enrichment with HP Tuners.
HP Tuners 4L60E & 4L80E Torque Management: How Much Should You Remove?
Learn how GM 4L60E and 4L80E upshift torque management works, why completely disabling it can be a mistake, and how to safely reduce torque management for quicker, cleaner shifts using HP Tuners.
HP Tuners GM Tuning: Power Enrichment (PE) & Catalytic Overtemp Protection (COT) Explained
Learn how Power Enrichment (PE) and Catalytic Overtemp Protection (COT) work in GM tuning, why they command additional fuel, and how to approach them correctly when calibrating with HP Tuners.
HP Tuners GM Tuning: Understanding Short-Term and Long-Term Fuel Trims
Learn how Short-Term Fuel Trims (STFT) and Long-Term Fuel Trims (LTFT) work in HP Tuners, what positive and negative corrections mean, and how to use fuel trims to properly dial in your GM calibration.