MS3Pro 1984-1987 Buick Grand National Plug and Play

The MS3Pro Buick Grand National Plug and Play (P/N: MSPNPPro-GNX8487) Fits 1984-1987 Buick Regal with the 3.8 Turbo V6, including Grand National, T-Type, and GNX.

Buick Grand National Plug and Play Model Features:

  • Fully Plug and Play Installation – No wiring required for basic functionality.
    • Average install time is under 1 hour!
  • Base map is pre-loaded to help your engine start on the first turn of the key
  • Real time tuning and data logging with a laptop connection
  • 8 GB internal data logging with built in SD card
  • Supports most aftermarket wideband sensors
  • Fits directly in the stock ECU pocket in the kick panel. No extension harnesses required!

Fully Tunable Engine Control!

  • 16×16 Fuel Tables allow high resolution tuning
  • 16×16 Ignition Tables
  • Multiple Acceleration enrichment strategies
  • Closed Loop Idle Speed Control
  • Air Conditioner Control
  • 6 sequential fuel injector channels with individual trim tables
  • Onboard peak and hold drivers support both high and low impedance injectors – No external ballast resistor is needed!
  • Allows removal of stock MAF sensor
  • Use either factory C3I ignition or coil per plug conversions
  • Torque converter lock up control
  • Boost control using stock or aftermarket boost control solenoids

Advanced Feature Set (Included!)

  • 12×12 Air Fuel Ratio Target Tables for use with wide band O2 sensor for precise tuning and table trim.
  • Multiple traction control strategies
  • Built-in 3-step rev limiter / launch control with flat shift and burnout rev limiter
  • Time based timing / boost increase after launch
  • Real time barometric correction
  • Internal 4-bar MAP sensor reads up to 44PSI of boost
  • Overboost protection
  • CO2 based boost control
  • Set boost by RPM and throttle, ground speed, or gear (Improve performance with EBC solenoid kit
  • Rally style anti lag
  • Water injection control – on/off or variable
  • Knock sensor input with adjustable sensitivity, crank angle windowing, and more (advanced features require bypassing ESC module)
  • Table switching input. Change fuel and spark maps on the fly for different fuels, nitrous activation, etc.
  • Input for flex fuel sensor – switch between E85 and gasoline on the fly!
  • CANBus connector allows interconnection of other MegaSquirt-compatible devices for additional functions (EGT Input, Automatic Transmission Controller if swapping to a 4L80E, Additional Sensors…..the possibilities are limitless!

What you get in the box:

  • MS3Pro Plug in ECU for Buick Grand National
  • RS232 tuning cable
  • Tuning Software and Documentation on USB memory stick with three base maps included
  • 6′ Vacuum Hose for MAP Signal and ‘T’ fitting
  • Registered version of TunerStudio and MegaLog viewer included

Add an optional USB tuning cable


Type: DIYAutoTune


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