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.

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.

The Torque Model is the biggest difference in the previous generation controllers. With just a few adjustments these vehicles will run great!

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.

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.

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.