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Which MegaSquirt Engine Management System is right for you?

Confused by all the options out there? Start here to determine which Engine Control Unit fits your needs. MegaSquirt EFI has grown from the original solder your own kits into a line with ECUs to fit a wide variety of needs and budgets. We now have everything from affordable solder your own circuit board kits…

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MegaSquirt Systems Compared

With all the different MegaSquirt options out there, choosing the right system can be a bit intimidating. The first decision you’ll need to make is the overall approach. Do you want to keep expenses as low as possible by soldering your own kit together? Or would you rather spend a bit more to save a…

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Corey Stephens Nitrous Fox Body Mustang running MS3Pro EFI hanging the front tires
Support Article

How to MegaSquirt Your Fox Body Mustang 5.0

  MSPNP Plug-N-Play Standalone ECU for your Ford Mustang — Get your 86-93 Fox Body Mustang or SN95 Mustang GT / LX up and running in minutes! Now Available:  MSPNP Gen2 and MS3Pro PNP for the 1986-1993 5.0 Fox Body Mustangs and MSPNP Gen2 and MS3Pro PNP for 1994-1995 SN95 Mustangs! These are fully loaded…

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Support Article

DIYPNP build it yourself plug and play systems

UPDATE: The DIYPNP product line has reached the END OF LIFE.  This page and ALL SUPPORT DOCUMENTATION will remain for archive purposes. Build Your Own EMS From the MegaSquirt Plug-N-Play Engine Management System Kit — The Do It Yourself Plug-N-Play MegaSquirt EMS you build from a simple kit. The DIYPNP is a kit based  feature packed…

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Sequential Fuel Injection – Do I need sequential injection to make big power? Does MegaSquirt EFI offer Sequential Injection?

What is Sequential Fuel Injection? Sequential fuel injection attempts to only spray fuel while the intake valve is open for the cylinder that is about to fire, which in most cases is only possible at low engine speeds between idle and low speed cruising.  Benefits can be seen in emissions, drivability, and fuel economy particularly…

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Support Article

How to MegaSquirt Your Mazda Miata

Please read the ‘disclaimer’ at the top of the parent page here. This documentation is for using the MS1/Extra firmware version 029v or later, MS2/Extra 3.3.1 or later, and MS3 1.2.4 and later. Plug and Play Solution available here.   How to MegaSquirt your Mazda Miata   Application: 1990-1997 Mazda Miata, or later models by…

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Technical Articles

MegaSquirt Information And Technical Help Note — these are here to help guide you and provide information. As with anything involving electronics, computers, and cars bad things can happen without proper research and planning. Do your homework. We cannot be responsible for any of your actions or their results whether based on this information or…

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Available Models

UPDATE: The DIYPNP prouct line has reached the END OF LIFE.  DIYAutoTune will continue production on the N76 ONLY, however, this page will remain for archive purposes. Click the DIYPNP Model Number below for the application list: B55   D56   F60  J64  J88  J93  N42   N52  N76  N122 DIYPNP B55  (Bosch Motronic Style 55 pin) Part# DIYPNPB55-K (DISCONTINUED) (Note:…

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Support Article

Mustang 5.0 MS2 + PNP Adaptor Harness kit

Note: The adapter harness kit is discontinued. This page is for reference for people still using this harness. You’ve received the MS2 3.57 Mustang PNP kit.  What do you do now?   Step 1: Read, read read!! All instructions and documentation are available online.  We have a tech article written about the EEC-IV adapter, available…

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How to MegaSquirt Your Nissan 240SX

How to MegaSquirt your Nissan 240SX Updated 4/10/2019 – notes on ECCS relay with MSPNP added Using the stock ignition module with MegaSquirt Application(s): 1989-1998 Nissan 240SX with KA24E or KA24DE Other vehicles with KA series engines, such as Nissan pickup trucks, are similar. This also works for distributor equipped versions of the SR20DE and…

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