How Make Your Own Megasquirt

Let's start with what to buy.

For this write-up I'm using the v3.0 board.

I order all my parts through diyautotune.com, a miataturbo.net forum sponsor.

Required Parts:

• Megasquirt I Kit
  • This is the main assembly kit. It comes with the board, case, DB37 connector to build your harness and all the components you need to build a MS.

• USB to Serial Adapter (Tuning Cable)
  • Required to use your laptop to communicate with your Megasquirt.

• PCBv3 and v2.2 -- Pullup Resistors 'ModKit'
  • Extra resistors needed to complete the Spark out and Tach input Mods.

• MegaSquirt Wiring Bundle - 23" Long
• 18" MegaSquirt Pre-built DB37 Harness
  • Wire bundle to build your DB37 harness. The MS-2 kit provides the connector, you need these wires to build the connector. The second link is a pre built (Highly recommended if you don't mind spending a little more).

Optional:

• MSPNP IAT Sensor Kit - Steel Bung
  • HIGHLY RECOMMENDED - Required sensor to remove the AFM or MAF. The kit has a bung to weld to pipes, extra wire and contacts to insert into the AFM/MAF harness for easy install.

• Boost Control Mod-Kit
  • Mod kit for the Boost Control feature.

• Relay Control 'ModKit'
  • Mod kit for an extra relay control

• PWM IAC Valve Control (TIP120) 'Mod-Kit'
  • (Standalone Only) - Mod kit to control the idle valve when removing the stock ECU.

Highly Recommended Tools:

• Lead Bending Tool
  • Helps bend leads for easy installation into the board.

• JimStim MegaSquirt Stimulator w/ Wheel Simulator -Unassembled
  • Used to communicate with your laptop without the need of a harness in the car; lets you test your build and flash firmware.

• Good soldering iron
  • Weller 25 Watt - Good Cheap Iron

• Small Phillips screwdriver

• Cutting tool to cut wire and leads

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And now…

On to Assembly!