Megasquirt and Ignition Control

Table of Contents
Board Mods for Distriburtor Ignition
Board Mods for Coil Pack Ignition
Wiring
Setting up the ECU code for spark
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Distributor Ignition

This is how you re-wire a Megasquirt V3 PCB to work with a VW distributor.

	Solder your 330ohm (1/4 watt) resistor to a jumper wire
	Then heat-shrink it so it doesn't touch anything.
	Solder the resistor to IGBTIN Run the wire diagonally across the board to the hole in the corner
	On the other side, form the jumper wire into a hook, and solder it onto the leg of R26, toward the DB9
	Now, add the small jumper from IGN to IGBTOUT
	Make sure that TSEL is jumpered to OPTOUT and that XG1 is jumpered to XG2
	Make sure that TACHSELECT is jumpered to OPTOIN

Board Mods for Coil Pack Ignition

(Coming Soon!)

Wiring

Now, for the wiring. The hall sender on a VW can use either +5v or +12v - it does not matter, it works fine with both. You need power and ground to the outer pins of the distributor as in the following pic:

I took +5v power and ground right from my TPS connector - they are right there. Make sure to run the wires well away from the spark plug wires. You can see in my pictures that I used Green for +5v power, Blue for the signal, and black for the ground. The Audi connector boot matches the split loom PERFECT!!


Then run the coil wire from Pin 36 to the negative side of the ignition coil. Power to the coil should come (with a fuse) off of the Fuel pump relay as in the diagram. I used a shielded wire for my coil - I grounded the shield at the megasquirt side to one of megasquirt's ground pins.
Like so:


That's it!!

	Megasquirt EDIS-4 Wiring Diagram
	Stock VW ignition System Diagram
	VW with EDIS-4 and Megasquirt + Spark

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Setting up the Code for Spark

COMMING SOON

Sources: Megasquirt Website; VWVortex Forums Post "The Megasquirt from CIS-E and Motronic Official Post!"

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