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

Ford Mustang Tuning Solutions – Plug and Play ECU Options for Fox Body Mustangs, SN95 Mustangs, and New Edge Mustangs. Even your Terminator Cobra!

The Ford Mustang continues to dominate at the race track, and for good reason.  Ford has done an amazing job building a chassis that’s ready to perform.  Particularly on the drag strip, where you’ll see Foxbody Mustangs probably more than any other chassis at many competitions, but also at the road course and at other…

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DIYPNP Documentation for 1990-1993 Mazda Miata

1990-1993 Mazda Miata USDM 1.6L B6 MT   Test Vehicle Details: The vehicle used for drawing up these application docs was a USDM 1991 Mazda Miata 1.6L with a manual transmission.  The factory wiring harness is in perfect condition. Other notes: MAF removed GM open element IAT installed IGN1A Race Ignition Coils installed in a…

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Information about our MSPNP line of Plug and Play ECUs

The Generation 2 MSPNP and even more capable MS3Pro Plug & Play reaches out to more of your favorite vehicles!   Beginning with the MSPNP2, we redesigned the core of the MSPNP hardware, basing it off of the much faster MegaSquirt-II processor which will give you all of the control you’ve been looking for! Your…

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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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Fox Body Mustang: Mass Air Flow vs. Speed Density – Which is better?

Isn’t Speed Density inferior and MAF the best tuning solution on a Fox Body Mustang? Nearly 30 years after Ford stopped production, the Fox Body Mustang remains insanely popular at the race track.  There’s probably no single chassis you see more of at the average drag race track, and there is good reason for that!…

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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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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 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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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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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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