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Standalone Engine Management, at a budget price. Take control of your GM Gen V LT1, L83, or L86 engine with Terminator X!

Terminator X and X Max Features and Benefits

  • Plug and play GM Gen V LT engine control including GDI and VVT support for engines with stock camshaft fuel pump lobes.
  • Ideal for swapping late model GM Gen V LT engines into vintage vehicles
  • 3.5” handheld gets your engine running in no time with a step-by-step calibration wizard.
  • GM LS and LT Drive-by Wire Throttle Body Control (Terminator X Max Only)
  • GM 4L60 and 4L80 Transmission Control (Terminator X Max Only)
  • Included engine harness plugs directly into the factory LT DI injector sub harness.
  • OEM Injectors supported, with part numbers provided in the handheld wizard, or software.
  • Genuine Bosch LSU 4.9 Wideband Control (Will not work with LSU 4.2 Oxygen Sensors)
  • On-Board Diagnostic LEDS for: ECU Power – Engine Run – Wideband Status – TPS Calibration – Crank Signal – Cam Signal – VVT Status – Pump Control – and DI Injectors. Allowing you to identify any Critical engine issues at a glance
  • Built in 1bar MAP Sensor, vacuum hose adapters included (1/8th – ¼ and 3/16ths) - or for Boosted applications, you can disable the internal MAP sensor, and utilize an external LT MAP Sensor, the harness comes with the connector terminated, making the installation a snap.
  • 4 Inputs – 12v, Ground, 5v, and Frequency, for things such as additional pressure sensors, or activation triggers for nitrous activation, or a trans brake (Fuel and Oil Pressure Inputs are pre-terminated)
  • 4 Outputs – Ground, PWM - , for accessories such as; fans, boost control, nitrous control, IAC Kit, and More
  • Boost Control – Boost vs Time, Boost vs Gear, Boost vs RPM, Boost vs Speed, Boost Safeties
  • Nitrous Control – Single Channel of Wet or Dry, Progressive or Non-Progressive, Rich/Lean Safeties, and target Closed Loop AFR
  • Integrated data logging to the 3.5” Handheld SD Card
  • Free EFI Tuning Software for complete control of your Terminator X power plant

Holley EFI GDI Controller Features and Benefits

  • Allows you to control and tune Direct Injection Target Fuel Pressure - with stock camshaft fuel pump lobes.
  • Provides you complete control over your Variable Cam Timing - Prepopulated tables are included in the software to get your L83/L86/ or LT1 stock camshaft configured without any guess work.
  • Tuneable Injector Phasing - Injector Phasing is quite important to the function of a direct injection engine. If you move the phasing too far the engine will effectively stop running. All Terminator X wizard calibrations have an injector phasing table configured to work with stock engines.

Plug and play installation!

  1. Plug and play installation makes installing a Terminator X on your GM Gen V LT engine hassle free.
  2. Minimal wiring termination required to get your engine up and running, simply wire Battery Power/Ground - Switched 12v and a Clean Chassis Ground.

How to Identify Early vs Late DI Fuel Rail Pressure sensors

  1. Proper sensor identification is critical when selecting any EFI system -
  2. There are two different fuel pressure sensors that GM uses with the Gen V LTx engines. Depending on which one your engine has will determine which kit/harness is required. The Sensor is mounted to the back of the driver side fuel rail (as shown below). Compare your sensor to the pictures above to determine if you have an early or late sensor.

Terminator X Max ECU Connections

  • J1A - Main Harness Connector - This connector is primarily an “Input” connector. It contains all the sensor inputs and wide band oxygen sensor control.
  • J1B - Main Harness Connector - The second connector is the “J1B” connector (26 pin). This connector is the “output” connector. It has 8 injector outputs and outputs for other devices.
  • MAP Sensor - used on N/A applications, connect directly to full manifold vacuum port on the intake manifold.
  • Main Power - Connects to the Main Power Harness, these two wires MUST be wired directly to the Battery Terminals.
  • J3 - Connection point for the Drive-By-Wire harness.
  • J4 - Connection point for the Transmission harness.

Terminator X ECU Connections

  • J1A - Main Harness Connector - This connector is primarily an “Input” connector. It contains all the sensor inputs and wide band oxygen sensor control.
  • J1B - Main Harness Connector - The second connector is the “J1B” connector (26 pin). This connector is the “output” connector. It has 8 injector outputs and outputs for other devices.
  • MAP Sensor - used on N/A applications, connect directly to full manifold vacuum port on the intake manifold.
  • Main Power - Connects to the Main Power Harness, these two wires MUST be wired directly to the Battery Terminals.

Diagnostic LED's

  • 5 Built-in multi-color diagnostic LED's allow you to quickly identify a variety of potential system issues, such as a failed TPS Autoset - faulty crank or cam sensors, or potential oxygen sensor issues!
  • 1. ECU Power - Green = ON
  • 2. Engine Running - Green = Running - Blue = No RPM - Red - flashing 1 sec on / off Error with crank or cam sensor
  • 3. VVT - Green = VVT working normally - Red = VVT Error detected resets with key cycle
  • 4. Pump Control - Green = High Pressure pump is functioning normally - Red = Error with high pressure pump Resets with key cycle
  • 5. DI Injectors - Green = DI Injectors functioning normally - Red = DI Injector error resets with key cycle, Short/open circuit detected, Overlapping injection event

Troubleshooting at a Glance!

Handheld Boost Control!

  • The Terminator X system integrates boost control functionality into the handheld, allowing you to easily change timing and AFR offset without needing a Laptop!
  • For the advanced user, the Terminator X Software contains a robust boost control system, with Dome Control, Boost By Time/Gear/RPM/Speed, and built in Boost Safeties.

Boost Control at your Fingers Tips

Nitrous Power Management!

  • If nitrous oxide is your power adder of choice, the Terminator X system put nitrous control in your hands!
  • Through the handheld you have the power to set Min/Max RPM for Nitrous Activation, retard or advance timing, set Target AFR, and even build custom progressive curves for both Nitrous Percentage, and Ignition Timing.

Nitrous Control made easy!

Mike Wittkopf's Gen V-swapped CJ-7

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    • Standalone Plug and play GM Gen V LT engine control including GDI and VVT support
    • Ideal for swapping late model GM Gen V LT engines into vintage vehicles
    • GM LT Drive-by Wire Throttle Body Control (Terminator X Max Only)
    • Built in 1bar MAP Sensor, vacuum hose adapters included (1/8th – ¼ and 3/16ths) - or for Boosted applications, you can disable the internal MAP sensor, and utilize an external LT MAP Sensor, the harness comes with the connector terminated, making the installation a snap
    • Terminator X Max - also Controls GM Automatic Transmission (4L60/4L80)
    • 4 Inputs – 12v, Ground, 5v, and Frequency, for things such as additional pressure sensors, or activation triggers for nitrous activation, or a trans brake (Fuel and Oil Pressure Inputs are pre-terminated)
    • Inputs & Outputs Are Ideal for Electric Fans, Boost Control Solenoids, Progressive Nitrous Control & More

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    Terminator X And X Max Gen V LT Direct Injection Kits

    Terminator X and Terminator X Max. Two powertrain management systems from Holley that offer plug and play control for most LT engines starting at just $1999.