Quick Links

MS3Pro Buick Grand National Plug and Play for 84-87 Buick Turbo
MS3Pro Buick Grand National Plug and Play for 84-87 Buick Turbo
MS3Pro Buick Grand National Plug and Play for 84-87 Buick Turbo
MS3Pro Buick Grand National Plug and Play for 84-87 Buick Turbo
MS3Pro Buick Grand National Plug and Play for 84-87 Buick Turbo
MS3Pro Buick Grand National Plug and Play for 84-87 Buick Turbo

MS3Pro 1984-1987 Buick Grand National Plug and Play

From: $1,429.00


USB to Serial Adapter -TunerStudio – optional

In stock

In stock

SKU: MSPNPPro-GNX8487 Categories: , Tags: , , , , , , , Brands: ,


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

Where is this product assembled?

  • This product is assembled in Gainesville, Georgia, USA.

Will this fit other GM turbo V6 applications, such as the Turbo Trans Am, Typhoon, or Syclone?

  • These vehicles used significantly different wiring and electronics; this MSPNP will not fit factory wiring harnesses other than the Buick Regal version.

Is this all that I need to get started tuning my Buick?

  • This is a complete package. But there are some accessories you may want to use to get the most out of this unit.

Questions & Answers

  1. 0 votes

    Expected release date looks like it will be early March 2018. Please contact us if you would like an email announcing when they're ready for purchase.

  2. 0 votes

    The wiring simplification and base tune are the two biggest selling points - it also has sequential peak and hold injector drivers, and as it is based on the MS3Pro, there's a bit more electrical noise resistance as well.

  3. 0 votes

    Yes, the base tune will be configured for the factory narrow band sensor, but it is very straightforward to change it to most aftermarket wideband controllers.

  4. 0 votes

    The connector is included. We will also sell replacements separately if you lose the one shipped with the ECU.

Take 10% OFF MSPNP Gen2, MS3Pro Plug & Play ECU's and Accessories, enter coupon code MSPNP at checkout! SALE ENDS Monday @ MIDNIGHT EST! Dismiss