EFI Live AutoCal V3 Installation Guide

Pre-Installation Guidelines

READ THIS BEFORE PROCEEDING WITH INSTALLATION — Your EFILive AutoCal V3 is a powerful tool. These steps protect your vehicle and ensure a smooth flash.

⚠️ USE AT YOUR OWN RISK. These devices are intended for OFF-ROAD VEHICLE USE ONLY.

Do not attempt to read the stock file using AutoCal. For stock file needs, contact your dealership for a reflash.

  • Ensure battery voltage is stable (use a charger if needed).
  • All aftermarket electronics (radios, lights, etc.) should be turned off.
  • Park on level ground, engine off, key in "RUN" position.

Support Availability

Our support is available during regular business hours only. Any urgent requests or after-hours support might not receive an immediate response. Please plan your tuning process accordingly for a smoother experience.

Installation Process

The AutoCal V3 installation is straightforward. Before beginning, verify that your battery is in good condition and all connections are clean.

  • Step 1 - Connect the OBD2 cable to the AutoCal device.

  • Step 2 - Plug the other end into the vehicle's OBD2 port (driver side, under dash).

  • Step 3 - Power on the device, navigate to the Tune menu, and press Enter.

  • Step 4 - Choose the Tuning option.

  • Step 5 - Select Program Full.

  • Step 6 - Pick the appropriate Calibration file for your AutoCal device.

  • Step 7 - Follow on-screen prompts to complete the installation. Do not interrupt power.

Engine-Specific Instructions

🔧 2007-2012 & 6.7L Cummins

Patch file required - Install the patch file BEFORE loading the tune to avoid PCM damage.

  • Locate the intake air throttle valve on the driver's side, under the intake near the intercooler pipe.

  • Unplug this valve - leaving it plugged can cause sticking / RPM issues.

  • If unsure, consult a professional diesel tuner.

✔ 5.9L & 6.7L (2006-2021) supported

⚙️ 6.6L Duramax (LB7 - LML)

Unplug intake air throttle valve - passenger side, near alternator.

  • LML 2011-2016: Unplug both EGR valves (driver side + passenger side).

  • Also unplug the intake air throttle valve - failure to do so may cause no-rev or limp mode.

  • DSP5 rotary switch included (engine-specific).

✔ Covers LB7, LLY, LBZ, LML (2001-2016)

⚠️ Critical: For 2007-2012 Cummins, always install the patch file first. Failing to do so could damage the factory PCM, potentially requiring a dealership re-flash.

Calibration Adjustments

Truck specifications vary. If your EFILive AutoCal V3 calibration isn't performing as expected, contact us with the following details:

Order number (required)
Year / Make / Model
Complete VIN
Transmission Type (Auto / Manual)
Transfer Case Type Manual or SOTF
Fuel Tank Single or Double
Tire Size (GM / Chevrolet only)
Vehicle Modifications (intake, exhaust, turbo, etc.)

Note: We cannot proceed with your request without all of the above information. Make sure to include every detail so we can help optimize your calibration quickly and effectively.

Cummins vs Duramax — Side by Side

EFILive AutoCal V3 packages for Cummins and Duramax. Each includes hardware, custom tunes, and a physical rotary switch. Compare below.

EFILive AutoCal V3 for Cummins 5.9L / 6.7L Cummins

EFILive AutoCal V3 - Cummins Package

  • Includes physical AutoCal V3 device to flash, log, and clear codes
  • Custom tunes mapped to 5.9L & 6.7L Cummins ECMs (2006-2021)
  • Package explicitly includes a physical CSP5 rotary switch
  • Full DPF/EGR delete tuning capability
  • On-board diagnostics & real-time data logging
View Cummins Package →
EFILive AutoCal V3 for Duramax 6.6L LB7-LML Duramax

EFILive AutoCal V3 - Duramax Package

  • Includes physical AutoCal V3 device to flash, log, and clear codes
  • Custom tunes mapped to 6.6L Duramax LB7-LML ECMs (2001-2016)
  • Package explicitly includes a physical DSP5 rotary switch (engine specific)
  • Switch-on-the-fly tuning capability
  • Built-in diagnostics & emissions-delete ready
View Duramax Package →

Choose the EFILive Cummins package if you own a 5.9L or 6.7L Cummins diesel (2006-2021). Includes CSP5 rotary switch and custom tuning for RAM trucks.

Choose the EFILive Duramax package if you own a 6.6L Duramax LB7, LLY, LBZ, or LML (2001-2016). Includes DSP5 rotary switch built for GM trucks.

Bottom line: Both packages deliver the AutoCal V3 hardware, custom delete-ready tunes, and a physical rotary switch — just select the one that matches your engine family. No compromises, just plug-and-play diesel performance.

Frequently Asked Questions

Can I read the stock file with AutoCal?▼

No. The stock file cannot be read directly using AutoCal. If you need the original stock file, contact your dealership for a reflash to ensure correct factory settings.

What happens if I damage the factory PCM?▼

Damaging the PCM can lead to significant repair costs and a possible dealership re-flash. Always follow instructions carefully — especially for 2007-2012 Cummins (install patch file first).

Do you offer support after regular business hours?▼

Our support is only available during regular business hours. Please plan your installation or calibration updates accordingly to avoid delays.

Which rotary switch is included?▼

Cummins package includes a CSP5 switch. Duramax package includes a DSP5 switch (engine-specific). Both allow on-the-fly power level changes.

Need help? Contact us with your order number and vehicle details. We'll respond within business hours to get your EFILive AutoCal V3 dialed in perfectly.