1993-1995 Toyota SW20 MR2 & ST185 Celica All-trac / GT-Four 3SGTE MSPNP Gen2 ECU

Description

Enhance your 93-95 Toyota SW20 MR2 & ST185 Celica All-Trac (GT-Four) 3S-GTE with the AMP|EFI MSPNP Gen2 Plug & Play ECU – a fully standalone, plug-and-play engine management solution designed for easy installation and maximum performance. This ECU is a great choice for racers seeking a reliable, budget-friendly and capable alternative to the MS3-Pro/MSPNP-Pro Engine Management System for off-road and motorsports applications.

Important: This unit is designed for Manual Transmission Only and does not support Automatic Transmission Control.

Compatibility:

93-95 Toyota SW20 & ST185 3S-GTE MegaSquirtPNP Gen 2 ECU Supports:

• 1992-1993 ST185 Toyota Celica All-Trac / GT-Four: 2.0L DOHC Turbo [3S-GTE] (Manual Transmission)
• 1993-1995 USDM SW20 Toyota MR2 Turbo: 2.0L DOHC Turbo [3S-GTE] (Manual Transmission)

Important Compatibility Notes:

• JDM 3rd generation 3S-GTE: Compatible
• 1996-2000 Toyota 4A-GE 20v blacktop: Undocumented

The MegaSquirtPNP Gen 2 is pin-compatible with the 1996-2000 Toyota 4A-GE 20V Blacktop. Some users have successfully installed it using the stock 20v harness, but we do not offer documentation or a base map for these engines. Support for non-standard applications is limited compared to a fully plug-and-play install. Verify compatibility with non-U.S. or non-Canadian Toyota ECUs by checking the part numbers below.

Toyota ECU Part Numbers Replaced by this ECU:

• • 89661-28280
  • 89661-28290
  • 89661-17380
  • 89661-17390
  • 89661-17460
  • 89661-17470

May fit other applications; please feel free to contact us if you’re not sure.

Important Installation Note:

• IAT Sensor Installation Required: Included (1) IAT Sensor & (1) Aluminum Weld-in Bung

Features:

• Fully Plug and Play Installation: No wiring required for basic functionality except for the included air temperature sensor.
  • Average Install Time: Under 1.5 hours!
• 3S-GTE Start-up Map Pre-loaded: Helps your engine start on the first turn of the key
• Real-Time Tuning & Data Logging: Connect via laptop for easy data monitoring
• Supports Most Aftermarket Wideband Sensors: Integrates with popular systems for accurate tuning

Fully Tunable Engine Control:

• 16×16 Fuel Tables: High-resolution tuning for precise fuel control
• 12×12 Ignition Table: Optimize ignition timing for efficient performance tuning with smooth and responsive adjustments
• Multiple Acceleration Enrichment Strategies: Optimizes fuel and timing for acceleration
• Closed Loop Idle Speed Control: Keeps idle stable in varying conditions
• Air Conditioner Control: Manages AC load based on engine performance
• 4 Sequential Fuel Injector Channels: Individual trim tables for each injector channel
• Onboard High Impedance Injector Drivers: Drives modern injectors efficiently
• Allows Removal of Stock Airflow Meter: Offers more flexibility in tuning

Advanced Feature Set:

• 12×12 Air-Fuel Ratio Target Tables: Precise tuning with wideband O2 sensor integration
• Built-in 2-Step Rev Limiter: Configurable RPM management with launch control and flat shift functionality for seamless upshifts
• Real-Time Barometric Correction: Dynamic altitude compensation during engine tuning
• Internal 4-Bar MAP Sensor: Boost pressure monitoring up to 44 PSI for aggressive tuning
• Overboost Protection: Engine safeguarding through continuous boost level monitoring
• Closed Loop Boost Control: Precise boost management with compatible EBC Solenoid Kit
• Table Switching Input: Instant fuel and spark map changes for alternative fuel or nitrous activation
• Flex Fuel Sensor Input: Seamless transitions between E85 and gasoline
• CANBus Connector: Expandable connectivity with MegaSquirt-compatible devices for extended sensor and control integration

What’s in the Box:

• 1993-1995 3S-GTE MR2 / Celica MegaSquirtPNP Gen 2 ECU
• M8 Serial Tuning Cable
• 6′ Vacuum Hose for MAP Signal and ‘T’ Fitting
• 26 Pin Connector for Options Port with 6″ Wire Pigtail
• IAT Sensor with Connector and Pins
• Weld-in Aluminum Bung for IAT Sensor
• Tuning Software and Documentation Card
• Four Screws for ECU Mounting

Note: The paid version of TunerStudio is not needed to tune this ECU. The free version can access all the features and tables of the MegaSquirtPNP and can be found HERE. The paid version of TunerStudio adds tuning and analysis software, such as VE Analyzer Live to tune the fuel tables based on wideband O2 feedback (requiring a wideband O2 sensor and controller, sold separately). It also unlocks the ability to use customized dashboards, such as our MSPNP2 Dash, which is designed specifically to help make tuning your new build intuitive and easy!