omgpham…
27Jan/120

MegaSquirt DIYPNP ECU Build

I've been slowly building my MegaSquirt DIYPNP ECU, just wanted to take my time so I don't screw anything up. I have configured to be run on a standard engine with MAF removed, just so I can learn how to tune the basemap. This means standard narrow-band O2 sensor, stock TPS, etc...

All instructions can be found in the links below:
http://www.diyautotune.com/diypnp/docs.html
http://www.diyautotune.com/diypnp/apps/n76/usdm-mazda-miata-9093-16b6-mt.html

Build photos after the break =)

Read more after the break...

For photos of the unboxing, check my previous post here.


This is the ECU harness connector, plugs right into the MX-5 factory harness.



1. Resistors get soldered on first
2. Diodes and other taller components are installed
3. Connectors, ICs and the rest of the parts soldered


I found this to be the hardest part of the build. Heaps of wires that need to be cut to length, stripped and tinned. This pinout will be different for each model of car, pinout can be found on the DIYAutoTune website.



The finished ECU looking all clean =)