Installation Manuals & How-To Guides

Welcome to DIYAutoTune’s comprehensive installation hub! Whether you’re a seasoned professional or just starting out, our step-by-step guides are designed to help you confidently install and set up your performance tuning products. From ECUs to sensors and everything in between, you’ll find detailed instructions, tips, and troubleshooting advice to ensure a smooth installation process. Get…

MSPNP and DIYPNP IAT Temperature Sensor Kit – Aluminum Bung

SKU: PNP_IAT-A

MegaSquirtPNP and DIYPNP IAT Sensor Kit – Aluminum Bung This is a simple kit to make it easier for you when removing your AFM/MAF when using a MegaSquirtPNP or DIYPNP. In many cases, the air temperature sensor is built into the MAF, so removing it will require you to install an IAT Sensor (Intake Air…

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MSPNP and DIYPNP IAT Sensor Kit – Steel Bung

SKU: PNP_IAT-S

MegaSquirtPNP and DIYPNP IAT Temperature Sensor Kit – Steel Bung This is a simple kit to make it easier for you when removing your AFM/MAF when using a MegaSquirtPNP or DIYPNP. In many cases, the air temperature sensor is built into the MAF, so removing it will require you to install an IAT Sensor (Intake…

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DD-EFI 12.3″ Pro Dash for 94-04 Ford Mustang

SKU:

DD-EFI 12.3″ Pro Dash Megasquirt Digital Dash 12.3″ PNP Digital Dash for 94-04 Ford Mustang Build Time up to 6 weeks The DD-EFI 12.3″ Widescreen Digital Dash is the 1st fully Plug-N-Play Digital Dash that can be installed using any Megasquirt equipped vehicle.  The main focal point is the 12.3″ Ultra Widescreen giving you a huge real estate for…

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MS3Pro ULTIMATE Center Harness

SKU: MS3V-3_HB

MS3Pro ULTIMATE adds nearly 50% more I/O with the addition of a third AMPSEAL 23-pin, 8′ flying lead.  Harness arrives with color-coded, printed wires per the pinout below (black center connector) ***Center Harness ONLY in this listing, intended for people upgrading from MS3Pro Evo with no other changes needed, or from MS3Pro Gen1 (which requires…

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MS3Pro 1st Gen Wiring Harness Upgrade (for ULTIMATE and EVO)

SKU: MS3V-hrn_CK

If you have a previously installed MS3Pro harness (1st Gen flying lead or LS Drop On Harness) and want to upgrade to MS3Pro EVO or ULTIMATE ECU, the upgrade path is simple.  However, complete functionality will require a few basic changes to your 1st Gen harness.  Our wiring upgrade kit contains the 8 pre-pinned, color-matched wire…

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MegaSquirt-I Programmable EFI System PCB3.0 – Kit

SKU: MS130-K

Part # MS130-K; MegaSquirt-I Programmable EFI System with V3.0 main board – Unassembled Kit with Black Case Important Note: The BIP373 coil driver is sold separately and is only required for direct coil control. If you are using coils with internal or external ignition modules, you do not need any BIP373 drivers.  The MS130-K kit…

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AXM-100 High Voltage Tach Adapter

SKU: AXM-100

The AXM-100 high voltage tach adapter lets you control tachometers that trigger off the negative terminal of the coil with a low voltage signal from your ECU.

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4 Pin M8 Serial Cable

SKU: TuneCableM8

Replacement M8 to DB9 serial cable. This cable is used for certain plug and play applications where there wasn’t room for a regular DB9 connector, including the following: MS3Pro PNP for ’84-’87 Buick Regal 3.8 Turbo MSPNP Gen 2 for ’86-’93 Ford Mustang 5.0, ECU builds from mid 2018 and later MSPNP Gen 2 for…

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MS3Pro Ultimate F4/F6 Replacement Fuse

SKU: 0451.375MRL

The MS3Pro ECU’s feature user-replaceable fuses that protect against voltage spikes and other abuse. To replace these fuses, use a needle nose pliers to pull the fuse out of its holder, and then push in the replacement fuse by hand. This is the 375mA fuse used for protecting both 5V power supplies in the MS3Pro Ultimate ECU.…

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