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EFI AUTOCAL V3 Installation InstructionsUpdated 4 months ago

Important Pre-Installation Notes


  • These devices are for OFFROAD VEHICLES ONLY.
  • Do not attempt to read the stock file using AutoCal. If you need a stock file, contact your dealership for a reflash.

Support Hours: Support is available only during business hours.

Installation Steps

  1. Connect the OBD2 cable to the AutoCal device.
  2. Plug the other end into the vehicle’s OBD2 port.
  3. Power on the device, navigate to the Tune menu, and press Enter.
  4. Select the Tuning option.
  5. Choose the Program Full option.
  6. Select the Calibration file for your AutoCal device.
  7. Follow on-screen instructions to complete the installation.

Special Instructions

For 2007-2012 Cummins Trucks:

Important: Before installing the tune file, ensure you install the patch file first. Failing to do so can corrupt the factory PCM, leading to potential issues that might require a tow to a dealership for a factory re-flash.

Cummins Specific Instructions:

  • Locate the intake air throttle valve on the driver's side of the motor, underneath the intake by the intercooler pipe.
  • Ensure to "unplug" this valve. If it remains plugged, it might stick closed, causing the truck not to run correctly or rev up.
  • If you're unfamiliar with the location or the unplugging process, it might be a bit complicated. Consider seeking expert help if unsure.

Duramax Specific Instructions:

  • Before tuning, "unplug" the intake air throttle valve located on the passenger side of the motor, underneath the hood to the left of the Alternator.
  • For LML 11-16 trucks:
    • Unplug both EGR Valves. You can find the first on the driver's side and the other on the passenger side of the Engine.
    • Also, ensure to unplug the intake air throttle valve. Not doing so can cause the truck to malfunction or not rev-up.

Additional Resources

Calibration Adjustments

Not all trucks are the same. If the calibration on your EFILIVE AutoCal V3 isn't accurate, contact [email protected] for a custom calibration with the following vehicle details:

  • Year/Make/Model
  • Complete VIN
  • Transmission
  • Transfer Case Type: Manual or SOTF
  • Fuel Tank (Single or Double)
  • Tire Size (GM or Chevrolet only)
  • Modifications

Note: If all of the above details are not provided, we cannot process your request.

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