How to install Megasquirt and spark
Really bored now so I figure i'll do a quick write up on how to install the basic Megasquirt and Spark system. Advanced warning I do not have the relay board.
This is my setup some differances may occur.
EDIT: This is for the 82/83 turbo dizzy style.
1. Megasquirt control board (available at diyautotune.com)
2. Wiring harness (also available, you can use your own but this makes it easy)
3. IAT sensor (available at any GM/ford dealership as well as autozone ect...)
4. extra Vaccum hose for MS unit (same size as the vaccum canister uses)
5. Data link cable (to link MS and a laptop / computer for tuning)
6. Solder / soldering iron
7. Heat shrink (varriable sizes)
8. Zip ties, and electrical tape.
9. a couple 1k resistors
Parts not required but good to have
1. New Bosche style pigtails (for fuel injectors and CHTS)
2. Dielectric grease
3. Wide band O2 sensor
4. Relay control board
Ok now onto the install process.
1. First find a place that you will be mounting the MS ECU to. I sugest a place that is accesable to connect tuning cable to.
2. Lay out the wiring harness and take a carefull look at all the wires.
Big blue and green wires
1. Take #1-#3 injector pigtails and splice the signal side to the green wire. ( measure out the distance between injectors)
2. Do the same for #4-#6 but with the blue wire
3. Now for the power side splice in a single Wire to all 6 injectors (I used a big red wire 12guage I believe)
1. you will see a small 16/18 guage brown wire, this goes to the negative
side of the coil for the MS to send the spark signal too.
1. The yellow wire in the harness is for the CHTS so route that over to the other side of the engine and splice it into the new pig tail (if you got one) the other side of that pigtail goes to ground.
O2 sensor wiring
1. This is the Pink wire in the harness. Its pretty self evident what to do here.
1. Now this wire is the Orange one in the harness. Once you have figured out where you are going to install the sensor just wire like the CHTS. (I have mine installed into the J-pipe where the hose fitting goes to the valve cover)
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