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MegaSquirt MS3Pro for 90-05 Miata- NEW PRICING!

Price: $1,149.00

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Year Model:


Add GM Intake Air Temperature Sensor (+ $33.00)
Add stainless steel bung for GM IAT Sensor (+ $13.00)
Add USB to Serial Adapter (+ $35.00)
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DIY Autotune Logo MegaSquirt MS3Pro
1990-2005 Miata*

MegaSquirt MS3Pro – Plug-N-Play Standalone Engine Management System

1990-2005 Mazda Miata with manual transmission

Also fits 1994-1997 European and Japanese market 1.6 Miatas

MS3-Pro based MSPNP takes plug and play engine management to the next level!  Easy to Use and Install!

MegaSquirt MS3Pro Model #MM9495 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

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

  • 4 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 airflow meter

Advanced Feature Set (Included!)
  • 12×12 Air Fuel Ratio Target Tables for use with wide band O2 sensor for precise tuning and table trim.

  • VVT support if swapping to a later VVT motor

  • Programmable voltage regulator control for NB alternator swaps

  • Multiple traction control strategies

  • Built-in 3-step rev limiter / launch control with flat shift and burnout rev limiter

  • Real time barometric correction

  • Internal 4-bar MAP sensor reads up to 44PSI of boost

  • Overboost protection

  • Closed loop boost control (Requires EBC solenoid kit – stock boost control solenoid does not allow adjusting boost level)

  • Rally style anti lag

  • Water injection control – on/off or variable

  • Knock sensor input with adjustable sensitivity, crank angle windowing, and more

  • 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, Additional Sensors…..the possibilities are limitless!

What you get in the box:
  • MegaSquirtPNP-Pro ECU

  • MSPNP RS232 serial tuning cable, 6′ (USB adapter sold separately, if needed)

  • Tuning Software and Documentation on USB memory stick

  • 6′ Vacuum Hose for MAP Signal and ‘T’ fitting

  • Four Screws for ECU mounting

  • Registered version of TunerStudio and MegaLog viewer included

Where is this product assembled?

This product is assembled in Suwanee, Georgia, USA.

I have swapped a different year engine, will this still work?

You must use the MSPNP that matches the year of the engine harness you are using.

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

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

  • If you are tuning it yourself, a wideband O2 sensor system is a must have for adjusting the fuel.

  • This unit can function as a boost controller if you add a boost control solenoid package.

  • If you are removing the mass air flow meter, use our IAT sensor kit to provide the MSPNP with air temperature measurement.

Will this control VVT if I swap in a later VVT Miata engine?

Yes. VVT control is standard equipment on the MSPNP Pro.

What is the difference between the MSPNP Gen 2 and the MSPNP Pro?

The MSPNP Gen 2 will provide fuel and ignition control, plus some basic race features such as launch control and boost control. The MSPNP Pro adds a number of advanced features, such as:

  • Programmable alternator voltage control that you can adjust through TunerStudio

  • VVT control for '01-'05 engine swaps

  • Sequential spark control for coil per plug conversions

  • Eight fuel channels to allow for a fifth injector control or staged sequential injection

  • Boost by gear or ground speed

  • Timed boost delay and spark retard activated by launch control

  • Traction control

  • Rally style anti-lag

  • Advanced flex fuel support that allows blending almost all fuel and ignition tables based on fuel composition

  • Progressive nitrous control

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