Megasquirt Identification - What Megasquirt do I have?

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How to identify what Megasquirt version you have
If you are unsure what product you have or where to begin, follow through the table:

Product photoDescription

Megasquirt 1
From the outside this could be a Megasquirt-1 or a Megasquirt-2. Remove the upper two screws at each end of the case and remove the upper part of the case. Inside you will see a circuit board with either a big black chip or a plugin card.
Big black chip = Megasquirt-1.

Manuals for your product: here

Megasquirt 2
From the outside this could be a Megasquirt-1 or a Megasquirt-2. Remove the upper two screws at each end of the case and remove the upper part of the case. Inside you will see a circuit board with either a big black chip or a plugin card.
Plugin card = Megasquirt-2.


Manuals for your product: here

Megasquirt 3
This is a Megasquirt-3.
(Note taller case, USB port, SDcard slot and two connectors on other end. Some versions will have 3 LEDs instead of the 15pin connector in the photo.)

Manuals for your product: here
This is a v1 or v2 Microsquirt.

Manuals for your product: here
This is a v3 Microsquirt.

Manuals for your product: here
This is a Microsquirt module.

Manuals for your product: here
The DIYPNP is based around the Microsquirt module.

Manuals for your product: here and here
The original MSPNP is based around Megasquirt 1.

Manuals for your product: here and here
The MegasquirtPNP v2 is based around the Microsquirt module.

Manuals for your product: here and here
MS3-Pro from DIYAutoTune.com based around Megasquirt 3.

Information on your product here
MS3 Gold from EFIsource.com based around Megasquirt 3.

Information on your product here
Manuals for your product: here
This is the eMS-Pro originally from Spectre. At its core it uses Megasquirt-1 technology.

Manuals for your product: Install Guide   Tuning Guide   Megatune Reference. General Megasquirt-1 manuals here

For Megasquirt 1/2/3 it can also be useful to identify what Mainboard / PCB is inside the case
Board photoDescription
v1 mainboard, obsolete.
v2.2 mainboard, semi-obsolete. Not recommended for Megasquirt-2 or Megasquirt-3.
v3.0 mainboard, DIY through-hole board. Current.
v357 mainboard, non-DIY surface mount board. Current.


Looks different?

If you have a so-called Megasquirt that doesn't look like one of these or the circuit board is a different colour, it is almost certainly an illegal counterfeit.

See the Clones and Counterfeits page


If you are already connected with TunerStudio then the title bar in the program will show the Megasquirt firmware version already.

Tunerstudio header

In the example shown here, TunerStudio is connected to Megasquirt MS2/Extra firmware.

If you have a question, comment, or suggestion for this FAQ please post it on the forum.

No part of this manual may be reproduced or changed without written permission from James Murray and Ken Culver.