Harlan

iTrader: (3)

I've had a few of you guys pester me for my code/hardware. Here is a DIY to get you guys started. I'm breaking my code down into individual projects, because the master code I'm running is a bit specialized and would be hard for someone else to adapt on their own. You'll have to figure out your own display (if you even want one) and your own input method. Alternatively you can just read the data off the USB serial connection.


Attached first is the WI Controller, it controls a fuel injector to maintain a set percentage of water to fuel when out of cruise.
For use you need an arduino and a prototype shield. MAF signal connects to analog pin 2 (through a 1k resistor) and the output on pin 10 (through another 1k resistor) goes to a logic level transistor or a board like this:
Top MOSFET Button IRF520 MOSFET Driver Module for Arduino Arm Raspberry Pi | eBay

Also attached is a simple boost controller. Give it a 5 volt signal from a 3 bar GM map sensor and it will open and close the WG to maintain a pressure set-point. Use the same transistor setup as above, and use the pins defined in the sketch.

Also is the script to control the TI knock chip. I'm using it with a Bosch knock sensor and a shielded cable running to a MS 3 knock module board. Pins are defined in the sketch.
MS3 Knock Module Kit DIYAutoTune.com
I've seen numbers below 400 throughout the rpm band with properly functioning WI. It does go up with RPM, and without WI it can go above 400... I don't know how far because that's my boost cut limit. Engine cut is set at 500 and I haven't hit it yet. This has room for improvement with rpm set limits and windowing.

Fuel pump pressure control is waiting on parts to begin testing and I'll share when I've actually used some of the code.