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ms3pro-mini with harness
ms3pro-mini with harness
MS3Pro-Mini Dimensions

MS3Pro Mini Standalone Engine Management System w/ Harness

5 out of 5 based on 2 customer ratings
(2 customer reviews)



Frequently purchased together

Innovate LC-2 Digital Wideband Controller with Sensor - 38770


Introducing the MS3Pro Mini by AMP EFI

MS3Pro Mini by AMP EFI, the sleek and compact addition to our MS3Pro Wire-In ECU product line. This new ECU is designed to fit in the palm of your hand! Tailored for engines with up to eight cylinders, it boasts the same high-quality features as its larger counterpart, the MS3Pro EVO, including eight saturated injectors, four spark drivers, an on-board 4-Bar MAP sensor, barometric pressure sensor, and on-board SD card datalogging – all at approximately half the price of the Evo!

The MS3Pro Mini by AMP EFI is engineered to effortlessly support a diverse range of engines straight out of the box. Whether running sequential fuel and ignition on engines with up to four cylinders, sequential fuel with wasted spark on six or eight-cylinder engines, or powering a 2-rotor Wankel with separate leading and trailing ignition outputs, this versatile ECU is up to the task.

MS3Pro Mini Requires MS Firmware v1.6.0 or later and TunerStudio v3.2.0 or later.

What is in the box?

  • MS3Pro Mini Standalone EFI Controller
  • 8ft. Flying Lead Harness
  • USB FTDI Serial USB Adapter
  • M8 Tuning Cable
  • TunerStudio Registration Code

The MS3Pro MINI is ideally suited to popular engines such as:

  • Honda B-, K-, and F-series
  • Mazda B6 and BP series, including VVT
  • Mazda MZR / Ford Duratec
  • Toyota 1JZ/2JZ
  • BMW M20/30/50
  • 1/2/3/4 cylinder engines w/ distributor, wasted spark, or coil per plug ignition
  • 6/8 cylinder engines w/ distributor or wasted spark ignition 

The TunerStudio software (v3.2.0 or higher required, license included with purchase!) offers an intuitive tuning experience suitable for both professionals and enthusiasts. It includes self-learning and self-tuning fuel table strategies, streamlining the tuning process.

The MS3Pro Mini offers more capabilities than the AMP’d MicroSquirt, all at a comparable investment. Unlock a host of features and functionalities, making it a superior choice. Plus, upgrading is a breeze, ensuring you stay ahead with ease!

MS3Pro Mini by AMP EFI Configurable Inputs/ Outputs:

  • 8 Outputs for High Impedance Injectors (Unused Injectors can be repurposed as additional High-Current or PWM Outputs for General Purpose use!)
  • 4 Logic Level Spark Outputs
  • 1 dedicated Fuel Pump Relay/Controller Output
  • 1 General Purpose PWM Output (Ex: Idle Control)
  • 2 Conditioned Inputs for Cam/Crank Sensors (compatible w/ VR and Hall Effect)
  • 3 Digital Inputs, 2 are capable of high frequency input (Ex. Speed Sensor)
  • 4 General Purpose Analog Inputs
  • Onboard 1 Bar Barometric Sensor
  • Onboard 4 Bar MAP Pressure Sensors
  • Dedicated Inputs for CLT, MAT, and TPS Sensors
  • CAN and RS232 Connectivity

MS3Pro Mini by AMP EFI Features:

  • Up to 8 Sequential Saturated Fuel Injector Outputs
    • Use with High Impendence Fuel injectors
    • Any unused Injector Outputs can be used as High Current Digital or PWM Outputs
  • Up to 4 Sequential or 8 Batch-fire Logic Level Ignition Outputs
    • 4/3/2/1 Cylinder Sequential Spark
    • 8/6 Cylinder Wasted Spark
    • Supports single or dual coil distributor, wasted spark, and coil per plug
    • NOTE: AXM-130 Module is REQUIRED to control Ford TFI and/or MSD CDI ignition modules!
  • VVT Control
    • Open loop VVT control for 2-position camshaft
    • Closed loop control for fully variable camshaft
  • Idle Control – Multiple open & closed loop strategies
    • Simple On/Off Idle Valve
    • PWM 2 or 3 wire valves
  • E85 flex fuel sensor input
    • Extremely configurable for excellent performance and drivability regardless of fuel gasoline versus ethanol content.
    • Compatible with easy to find GM flex fuel sensor
    • Configurable flex blend curve allows blending of fuel tables, spark advance tables, afr target tables, alternate start and warmup settings, boost and overboost tables, and acceleration enrichment settings based on the exact concentration of ethanol in fuel
  • Compatible with YOUR wideband O2 controller
    • You choose the wideband controller you want without being locked down. From cost effective to full lab grade capability
  • Boost Control – Multiple open & closed loop strategies
    • Table based open loop (DC solenoid control)
    • Table based closed loop (Target specific boost pressures by load/rpm)
    • Switchable boost tables for high/low boost options at the flip of a switch
    • Boost by Gear
    • Boost by Speed
  • Internal SDCard high-speed data logging
    • No need for external datalogger!
    • 8GB standard memory. Easily expandable to 16GB
    • Real time clock calendar system for time and date stamped datalogs
    • Up to 28 channels at 100hz
    • No need to remove SD-Card to pull logs, pull them straight across the serial/USB cable to your laptop
  • Nitrous control strategies
    • 2 channels of configurable staged or progressive control
    • Supports wet or dry nitrous systems
    • Add fuel, pull timing, etc.
  • Three-step rev limiter with flat shift
    • Burnout Limiter
    • Launch Limiter
    • Redline Limiter
    • Line lock output
    • Flat Shift allows for No-Lift Shifting (holds RPM between shifts)
  • Trans Brake and Bump Box Control
  • Advanced Launch Control strategies
    • Digital switch based arming
    • Wheel speed based launch arming for rolling starts
    • Configurable timing retard after launch
  • Pit Lane Limiter
    • Speed limiter for pit lane, reduces engine power by spark retard/cut or fuel cut
    • Can limit based on VSS or RPM if no VSS input is available
  • Solenoid output control for air shifter/drag application
    • Automatic shift point mode
    • Configurable per gear delay
  • Water and Methanol Injection
    • Configurable to use a variety of water/meth pumps
    • Table based injection allows for variable water/meth injection based on load and rpm
    • Low fluid level detection safety measures
  • Traction Control – Multiple Strategies
    • Perfect Run (VSS over time)
    • Perfect Run RPM (Slew Control for classes where VSS is not allowed)
    • VSS % slip (compares front to rear or driveshaft speed)
    • Configurable Responses
      • Timing retard/cut
      • Fuel Adder
      • Nitrous Cut
      • Boost Reduction
  • VE based tuning
    • No Static PW fuel tables with stacks and stacks of ‘correction tables’ required.
    • Very simple/logical approach to calibration minimizes tuning time required!
  • Speed Density, Alpha-N, MAF based tuning & blended algorithms
    • ITB Mode – blends SD and Alpha-N for excellent drivability with naturally aspirated, multiple throttle applications!
    • Custom blended strategies supported, mix/blend strategies to suit any engine
    • Fuel and spark advance algorithms can be set set independently
  • 2D or 3D Table Views
    • The tuner can toggle between 2D or 3D table views with a single click
  • Individual cylinder fuel & spark trim tables
    • Per-cylinder, table based corrections for both ignition timing and fueling needs on a cylinder by cylinder basis. Correct for manifold airflow differences and fine tune each cylinder to perfection!
    • O2 sensors can be assigned per cylinder, allowing for perfect tuning and closed loop correction on a per cylinder basis
  • On-board Pullups
    • Selectable on board pullups for hall effect crank, cam, and vehicle speed sensors
    • Selectable on board shunts for VR crank and cam sensors
    • Selectable on board pullup for tachometer output
  • Table Switching
    • 2 sets of user configurable tables for fuel, spark advance, and boost tables
    • Dual Fuel Support
    • Beyond table switching, adds control of 2nd fuel system (pump and injectors), and adds 2nd settings for injector characterization; fuel stoichiometric point; priming, warmup, cranking, and afterstart settings; alternate acceleration enrichment tables; boost tables; and overboost protection settings.
  • Generic Wheel Decoder allows for support of nearly any standard trigger/aftermarket trigger pattern. 60-2, 36-1, 8-1, 4-1, pretty much anything!
  • Supports 50+ specialty OEM and aftermarket ignition systems using factory cam/crank wheels and sensors, including built-in switches for pull-up resistors for use with Hall effect sensors!
    • Chrysler 420A/Neon
    • Chrysler New Hemi 36-2+2
    • Dodge Viper V10
    • Ford EDIS
    • Ford Zetec VCT
    • GM 7x
    • GM LS 24x
    • GM LS 58x
    • GM OptiSpark
    • Harley Davidson 32-2 V-Twin (uses MAP for phase detection)
    • Honda TSX/D17
    • Honda KA24A2
    • Honda RC51/S2000
    • Mazda Miata NA
    • Mazda Miata NB1 and NB2 (VVT)
    • Mitusbishi 6G72
    • Mitsubishi 4G63
    • Nissan SR20
    • Nissan RB25
    • Nissan VQ35DE
    • Nissan QR25DE
    • Subaru 6/7
    • Subaru 36-2-2-2
    • Toyota/Lexus 2JZ VVTi
    • Yamaha YZF1000
    • Not a complete list — Many more supported trigger wheels
  • Support for oddfire and evenfire engines
  • Capable of controlling evenfire, oddfire, piston, rotary, and even radial engines
  • Fuel Only Mode
  • Disables ignition output features for control of fuel injection only
  • Rally style turbo anti-lag with rotational idle
  • Long Term Fuel Trim
  • OE Style automatic fuel trim to allow for changes in engine over time
  • High Power Time Enrichment
  • Allows for richer mixture after extended time in high power
  • Helps control cylinder and piston temperatures
  • Fully user configurable
  • Multiple Acceleration Enrichment Strategies
    • Basic time based and accel pump style AE
    • Advanced wall wetting model based (X-Tau and EAE) acceleration enrichment options
  • Staged Injection Control
  • Seamless transition to 2nd stage injectors for high power applications
  • Multiple user configurable strategies
  • Sequential shift spark cut
  • Fuel Pump Control
    • “On/off” control of single or multiple stage pumps
    • PWM control of OE variable speed/pressure pumps
  • Multiple Engine Protection and fault mode strategies
    • Check Engine Light activation (solid and flash codes supported)
    • Low Oil Pressure Warning System (illuminates CEL)
    • Limp Home Mode
    • 3 LED indicators for visual diagnostics
      • 12V main power
      • 5V ref
      • VCC (internal processor power)
    • Set low/high limits for all major sensors and activate engine limp mode or shut down responses
      • Water/Meth Injection Low fluid Level
      • IAT
      • CLT
      • TPS
      • MAP
      • Battery Voltage
      • Wideband O2 / AFR Safety
      • Sync Loss
      • EGT
      • Flex Fuel
      • Intelligent Knock Detection and Correction (see relevant topic above for more info)
  • Spare I/O for any standard/custom I/O needs
    • Configurable On/Off (digital) and PWM outputs
    • Control any relay controlled device or solenoid
    • Fan Control
    • Intercooler cooling spray (CO2/etc)
    • Torque Converter (TCC) Lockup
    • Auxiliary Fuel Pump
    • Multipurpose/Generic Closed Loop Control Outputs
  • Spare Analog Inputs for external sensors
    • Supports standard automotive temperature or pressure sensors
  • Air Conditioner Control with feed-forward Idle-Up
    • Proactively increases idle vale duty cycle (PWM valves) or number of steps (stepper valves) before activating A/C compressor
    • Automatic compressor shutoff at programmable throttle position or RPM thresholds
    • Automatic cooling fan activation with A/C, user configurable
  • Cooling Fan Control
    • Programmable fan on and off activation points
    • Can be configured to run fan with engine running only, or when engine is running and not running
    • Feed-forward idle up for use with large, high demand fans
    • Configurable fan deactivation based on TPS or VSS
  • Alternator Field Control/Voltage Regulation
    • Multiple open and closed loop strategies
    • Configurable voltage and temperature monitoring
    • Separate target voltages for afterstart, normal operation, over run, and WOT
    • Warning lamp output if voltage is above or below target
  • Comprehensive Test Modes
    • Test all outputs for proper functionality and verify wiring before starting the engine
    • Controls all fuel injector outputs, ignition outputs, idle valve, and general purpose outputs
    • Outputs can be tested for on & off or PWM pulse functionality
    • Injector and spark disable mode, allows checking for suspected problematic cylinder by electronically preventing combustion event
  • CAN Support for I/O expansion – virtually limitless I/O capability!
    • Up to 16 EGT inputs via CAN Expansion
      • Add fuel/engine shutdown capable
  • CAN Support for 3rd party dash devices
    • Currently offers support for RacePak, AIM, Race Technology, Traqmate, and Race Capture.
    • Pre-defined “simple” as well as fully configurable CAN broadcasting modes
    • Standard 11-bit message headers
    • Allows for simple integration with any 3rd party devices
  • Compact, Efficient & Robust Design
    • Small form factor
    • Circuitry optimized for efficiency, low power usage, and no generation of heat
  • Redundant signal ground wiring
  • No Dark Current!
    • No power draw when system is off. MS3-Pro will not discharge your expensive race battery when your vehicle is in storage.
  • Field Upgradeable Firmware – enable newly added features with a simple firmware update!
    • Firmware is constantly under development and updates are easy to load via simple software interface.

EPA, CARB & Emissions Disclaimer- All ECU's are for race purposes only. It's your responsibility to remain in compliance with all federal, state, provincial, or other laws that apply to you.

Customer reviews

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2 reviews for MS3Pro Mini Standalone Engine Management System w/ Harness

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The latest MS3Pro Documentation, Firmware & Software can always be accessed at

Drivers for the USB connection can be found on the FTDI website

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Where is this product manufactured?

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

What is the warranty on the MS3Pro Mini?

  • It carries a one year warranty against manufacturing defects.

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