Engine Management Systems & Tools






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MegaSquirt Technical Help For Installing EFI/EMS Systems



All of the following information is provided in the hopes that other's efforts can be of benefit to you in your install.  I don't have one of each type of vehicle mentioned here so I don't have first hand experience with most of these to confirm each of them.  This information is here to help point you in the right direction to get your car Megasquirt'd.  As the MegaSquirt is a Do-It-Yourself engine management system I encourage you to take your time, do your research, and take responsibility for your installation and tuning. 

Some of the articles may have base tuning maps available as well-- it is important that you make sure you understand that often these maps will only work with the same version of firmware and MegaTune they were built on.  You can manually transition the settings over into a new firmware of version of MegaTune but simply loading the .msq into a different version than they were built on can have unpredictable results.  Also-- just because a map was built on a car just like yours doesn't mean you should load the map on your car and go for some WOT runs-- take the time and be responsible for your own tune, make sure it works right on YOUR car, make sure the timing and AFR's are right.  Consider these 'base maps' and NOT final products.

Sorry for the disclaimer... but you gotta understand in this age of hyper-active legal action combined with a lack of personal responsibility ;) MegaSquirt Install Articles

These are articles written and hosted here, still not always from first hand experience but often from information gathered with the help of others with first hand experience.  Credit is of course given in the articles to those who helped me bring it all together.  These are 'living' documents that will be updated over time, if you see changes that need to be made please call them out to me!

Note: For DIYPNP installs, see the DIYPNP Models page.


Chevrolet / GM














Mopar (old school)

  • How to control the ignition on your vintage Mopar engine   Matt Cramer (owner of a turbocharged and MS'd Dodge Dart) pours out some of his Mopar and MegaSquirt knowledge for us all!  This article covers ignition control of vintage Mopars.  You'll still have some other work to do if you want to convert to EFI as well...  You can always do one and then the other using the same MS...











MegaSquirt Support And Information





Articles found throughout the Web

Not written/hosted by

1962 Corvair  Carb-to-EFI highlights

Ford Windsor Carb-to-EFI conversion  (relevant to any V8 EFI conversion really)

Non-Car Specific-- Carb-to-EFI Conversion

BMW 2002  (1973)            Carb to EFI Conversion using MegaSquirt

BMW 2002  (1973)   #2            Carb to EFI Conversion using MegaSquirt

Chevy Small Block    305 TPI installation

Chevy LS1    MS1/Extra using stock sensors and coils

Datsun/Nissan 280zx    (1983)        Full replacement of factory ECU using a MegaSquirt-I running MSnS for fuel and ignition control

DSM -- Second Gen Non-Turbo        Covers tapping into existing harness for fuel control.  Factory ECU controls timing.

DSM -- 4g63 Powered        Full fuel and ignition control a la MSnS-E!

Mazda MX-6 / Ford Probe - covering the '88-'92 models with the F2T turbo motor.

Mazda RX7  -- Muythaibxr is the authority on MegaSquirt conversions on the RX7; here is his FAQ. This is a part of a Megasquirt subforum on RX7Club.

Mazda RX7 -- Aaron Cake has a very in-depth writeup on his home page for how to make the MegaSquirt work with the RX7. Covers both MegaSquirt I and II.

Mazda B2600 Truck -- Check out this site for tons of info on a B2600 Turbo Conversion, including MS-2 Wiring Information

Mercedes-Benz M110 -- Installing a GM TBI on a carbureted motor.

Mercedes-Benz 280SL (1985) Detailed K-Jetronic to EFI conversion.

Mercedes-Benz 450SLC (1980) Converting from the mechanical K-Jetronic to a Megasquirt

MGB Write-ups:

Ford TFI  --  This used to point to a page that generically covered the Ford TFI ignition system with the MS-I and MSNS_E ignition system, that page is gone now.  Check out my How to MegaSquirt your Mustang! page for good info on this that really applies to all TFI based ignition systems using the grey TFI module.

Toyota Corolla (AE86)    (1987)    Full replacement of factory ECU using MSnS-E to control fuel and spark

Toyota Paseo - "Wedge" builds a homemade plug and play harness for the 5E-FE motor.

Toyota RAV4 - The same James L. who brought you the MR2 writeup tackles a 3S-FE RA4. Includes DIYPNP and regular MS2 information.

Triumph Spitfire with GT6 swap (1975) Carb to EFI swap along with a wasted spark ignition conversion

Volkswagen-  I've got three threads for your to check out here with tons of information

Volvos -- You'll find more Megasquirt writeups at -- just search for 'MegaSquirt' on the message board.


More to come!  If you've got documentation you'd like to see posted here drop me an email to let me know!



Want to learn more about Engine Management Systems and Tuning?

Matt and I (Jerry) recently wrote a book titled 'Performance Fuel Injection Systems' that is now available.  We went through alot of effort to cover this topic in great detail, but from a practical perspective.  (Click this link if you'd like to check out/purchase our book.)

HP1557 - Performance Fuel Injection Systems

DIYAutoTune is an MegaSquirt EMS/EFI manufacturing and distribution company. Our main offerings include: MegaSquirt Plug-N-Play Engine Management System Kit, including several new vehicles, our MegaSquirt-I system, MegaSquirt-II, and MegaSquirt-III Assembled and unassembled versions, both with black cases.
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Performance testing & tuning by LoadStorm.