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MicroSquirt ECU
MicroSquirt ECU
MicroSquirt ECU by DIYAutoTune, MicroSquirt with 30, MicroSquirt with 8
MicroSquirt ECU

MicroSquirt ECU Version 3.0

5 out of 5 based on 1 customer rating
(1 customer review)

$314.00

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Description

The versatile MicroSquirt ECU Version 3.0 is an ECU plus much more – Standalone Engine Management System, Transmission Controller or CAN I/O Expansion Module (alternate functionality requires firmware change)

MicroSquirt ECU is our entry-level, fully assembled ECU with varied applications targeting power sport and single cylinder all the way up to 8 cylinders with up to 2 fuel and 4 spark outputs. Over 40 different ignition modes are supported from mainstream applications like GM LS1, Ford Zetec, Bosch Motronic, and Chrysler Gen III Hemis to unusual modes like Renix Jeep and the Suzuki Swift GTI.

MicroSquirt ECU hardware features

  • 2 high impedance injector outputs – max peak current 4.5 amps
  • 2 dedicated spark outputs
  • 2 general purpose on/off outputs – can be repurposed as spark outputs
  • 1 PWM IAC output – can be repurposed as general purpose output
  • 1 dedicated fuel pump output
  • 2 variable reluctor conditioned inputs
  • 1 optoisolated RPM input
  • 1 flex fuel or general purpose switched input
  • 7 analog inputs

MicroSquirt ECU software features

  • Supports speed density, alpha-N (TPS based), or MAF based fuel and spark tables
  • 0.66 microsecond injector pulse width resolution
  • Allows blending multiple load types, including specialized mode for independent throttle bodies
  • Supports a wide variety of OEM cam and crank position sensors
  • Accelerator pump or model based acceleration enrichment
  • Closed or open loop idle speed and boost control
  • On/off nitrous control
  • Wankel rotary support: 2 rotor engines with separate leading and trailing spark tables
  • Staged injection
  • Table switching
  • 16 x 16 fuel tables
  • 12 x 12 spark tables
  • 2 step rev limiter (launch control) with no-lift shifting
  • Wideband AFR target table
  • Flex fuel sensor input
  • Real time barometric correction (external sensor required)
  • Sequential shift cut and air shifter control

MicroSquirt ECU Transmission Control Options

MicroSquirt transmission control free firmware allows you to use MicroSquirt with 30″ Harness to control a number of electronic automatic transmissions (gearboxes). It can work standalone or integrate with one of our ECU’s over canbus.

Control applications: GM 4L60E I GM 4L80E I GM 4T40E I GM 5L40E (dev) I A341E I 41TE (dev) I Ford 4R70W I Ford E40D (dev) I Subaru W4A33 & more…

MicroSquirt ECU CAN I/O Box Expansion

Microsquirt I/O Box firmware allows you to use a Microsquirt as a plug’n’play I/O extension box for MS3 or MS3Pro ECUs. It can offer a useful I/O addition:

-7 Analog inputs (0-5V variable)
-2 Wheel speed inputs (VR or hall type)
-2 Wheel speed (hall type) or ground-switch inputs
-1 dedicated ground-switch input
-2 high current PWM/switch ground-switching outputs
-4 mid current PWM/switch ground-switching outputs
-1 low current PWM/switch 0-12V output
-Perfect for capturing and logging vehicle speed and additional sensor data (e.g. pre- and post- intercooler temperatures, fuel pressure, oil temperature etc.)

To Use a GM 1, 2, or 3 Bar MAP Sensor with the MicroSquirt ECU

In the illustration:

A is ground,
B is the sensor output signal to MicroSquirt,
C takes 5 Volts from MicroSquirt.

The pins are marked A-B-C on the sensor itself.

Customer reviews

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1 review for MicroSquirt ECU Version 3.0

Only logged in customers who have purchased this product may write a review.

Is this just for motorcycles and other small engines, or can it be used in a car or truck?

  • The MicroSquirt can run regular automotive engines; it’s not just for powersports applications. It is possible to run this on a V8 in wasted spark, although it doesn’t have very much I/O to spare for extra functions when using four spark outputs.

I’ve heard some people say it has two spark outputs and some say four. What’s the deal?

  • It was originally designed for two spark outputs, but the MS2/Extra code allows you to use WLED and ALED outputs as additional spark outputs. You will need to add resistors in the wiring harness for using them with most coils.

Is it waterproof?

  • No, but you can make it waterproof with a bit of RTV silicone around the edge of the case.

Are there other versions of the MicroSquirt for other functions? Transmission control or the “IO Box”, for example?

  • These all use the same ECU, just running different code to change its function and use it as a transmission control unit or I/O expansion device. See MSExtra.com for details.

Could I use two MicroSquirts, one running the engine and one running the transmission?

  • Yes. They would link up over their CAN networks to look like a single unit to the tuning software.

Where is this unit made?

  • They are built in the USA.

What do I need to tune this unit over USB?

Questions & Answers

    I am in the market for an aftermarket ecu for my Nissan vg33et - can you confirm if the features in Microsquirt will be sufficient or are there added features to Megasquirt that will be required to run the car? The only changes I plan to make that will require extra tuning is the injector / turbo setup.
  1. 0 votes
    Q I am in the market for an aftermarket ecu for my Nissan vg33et - can you confirm if the features ...... Read more
    Asked by frnk
    Answered by the admin

    The MicroSquirt can run a V6 as long as you use high impedance injectors or suitable current limiting resistors for low impedance injectors. It will support a Nissan optical distributor, or you can add one of our trigger wheels to support distributorless ignition. Idle control can be done with a PWM type (2 or 3 wire) idle air control valve. Please contact our technical support team if you have any questions.

  2. Will I need anythig else for a turbo 351w?
  3. 0 votes
    Q Will I need anythig else for a turbo 351w?
    Asked by Michael
    Answered by the admin

    This listing is for the ECU only, no wiring or sensors. There are several different ways one could set up a 351W. Please contact our technical support department if you want to go over your build in more detail. We'd be glad to get a recommendation together for your specific build.

  4. is it possible to run this on a 74 BMW r90s I'm ringing the bike up for fuel injection with turbo thanks
  5. 0 votes
    Q is it possible to run this on a 74 BMW r90s I'm ringing the bike up for fuel injection with turbo...... Read more
    Asked by Dave
    Answered by the admin

    Yes, it can either run fuel-only or control both fuel and ignition.

  6. Hello, Is the Micrpsquirt compatiable with 1994-1995 mustang GT? If so what all is required?
  7. 0 votes
    Q Hello, Is the Micrpsquirt compatiable with 1994-1995 mustang GT? If so what all is required?
    Asked by Len
    Answered by the admin

    Yes, and it will run the stock sensors except that you will want to add a GM type MAP sensor as well as a wideband O2 sensor for tuning. If you are using the 4R70W automatic, you will need to add a second MicroSquirt to operate the transmission.

  8. Do you have a micro squirt full kit for a 87-93 mustang
  9. 0 votes
    Q Do you have a micro squirt full kit for a 87-93 mustang
    Asked by JD
    Answered by the admin

    The MicroSquirt is a universal ECU and can run a wide variety of engines, including a 5.0 Mustang.

  10. Hello, I would like to use this ecu for my 1985 e30 which I'm planning to go turbo, will this Ecu work?
  11. 0 votes
    Q Hello, I would like to use this ecu for my 1985 e30 which I'm planning to go turbo, will this Ecu...... Read more
    Asked by Kelvin
    Answered by the admin

    Yes. If you have the M10 four cylinder, you can either use the stock distributor advance for ignition control and run fuel only or modify the engine for electronic ignition control. For the M20 eta six cylinder, your best bet is to swap to the later M20B25 crank trigger setup to let the MicroSquirt control your timing.

  12. Hello! I would like to use this microsquirt to convert my carbie 1981 Suzuki GS650G into efi (sequential efi would be nice, but I feel may be mute on such a small displacement, high reving engine, maybe?) I have already converted the stock ignition over to a dynatec dual Hall effect sensor trigger and dual 3.0 ohm coils, so I'm not sure if these would be compatible, but could be secluded if needed. There will be individual throttle bodies along with multi port injection shared by a common plenum. I can't think of anything else, but thanks in advance!
  13. 0 votes
    Q Hello! I would like to use this microsquirt to convert my carbie 1981 Suzuki GS650G into efi (seq...... Read more
    Asked by Josh Henderson
    Answered by the admin

    On a four cylinder, a MicroSquirt can run bank to bank fueling but not sequential fuel control. The engine is likely to run fine on bank to bank fueling although sequential fuel control may give a few improvements to idle control and light throttle drivability. You will probably need a QuadSpark ignition module to fire this coil.

  14. Is it compatible with 4g63 Motors?
  15. 0 votes
    Q Is it compatible with 4g63 Motors?
    Asked by Joseph
    Answered by the admin

    A MicroSquirt can control fuel and ignition on a 4G63, no problem. See the 4G63 notes in the MS2/Extra MicroSquirt Hardware Manual for details.

  16. I would like to use a MicroSquirt to control a 2012 Harley twin cam engine. Can I add a missing tooth wheel to the cam gear for phase detection?
  17. 0 votes
    Q I would like to use a MicroSquirt to control a 2012 Harley twin cam engine. Can I add a missing t...... Read more
    Asked by Henry
    Answered by the admin

    Current MS2/Extra firmware can use a MAP sensor for phase detection on a V-twin if you are using a missing tooth crank wheel. No cam wheel needed.

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