Megasquirt Manual Index

This is the index to the Megasquirt manuals and other documentation for Megasquirt. PDFs for offline reading are available.

Click the links to go to the required information. Unsure? What Megasquirt do I have ?

Megasquirt-1 web manuals (Manuals for MS1/Extra.)

Megasquirt-2, MS2, Microsquirt, DIYPNP, MSPNP2, Microsquirt-module manuals (Manuals for MS2/Extra.)

Megasquirt-3 manuals

MS3-Pro manuals are available on’s site or core manual: PDF WWW

EMS-Pro manuals

MegaStim/JimStim information


Manuals for Microsquirt Transmission control and Microsquirt-IO box are available through their product pages.

The original ‘MegaManual’ should only be used for the alternative “B&G” MS1 or MS2 firmwares.  Link here. The vast majority of customers should not use it as you will find the information misleading and confusing – use the manuals from this current site.

Background information

Megasquirt CAN broadcasting protocol, including dash broadcasting  PDF .dbc

Megasquirt 29bit CAN protocol PDF

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