[PSIG]

In your diagram, I see some basic errors such as backwards relay wiring (your ignition switch power is shorted straight to ground, as one), and other stuff that is odd, such as a 3-ohm resistor from your main power line directly to ground. Stuff like that.

[Alfagta]

In your diagram, I see some basic errors such as backwards relay wiring (your ignition switch power is shorted straight to ground, as one), and other stuff that is odd, such as a 3-ohm resistor from your main power line directly to ground. Stuff like that.

Contact 1 on the kill switch is off when the switch is on. So the 3 ohm resistor is basically to ground the 12v side when kill Switch is off. Thats fine.

Contact 2 is on when the switch is on, this grounds the ecu. I would do it a bit different. From key switch (ignition switch) go to one side of contact 2 and from the other side fia 5A fuse to the ecu 12v. I would not switch of the ecu ground, this should always be grounded solid. ( flyback during switching off the kill switch ).
I think that is mixed up a bit.

[147_Pat]

Thanks for the heads up on the ECU ground vs power, I'll look into that and re-draw it.

On the ECU front, I've been learning how how tuner studio works and to play around with it I've been trying to bench test my sparks to learn a bit more about everything.

I have some R8 ignition coils (06E905115E)

They are 4 wire smart coils and I have them wired up as follows

Pin 1 - 12v - Battery positive
Pin 2 - secondary ground - Speeduino Ground
Pin 3 - 5v signal wire - Speeduino ignition pins (7,8,33,34)
Pin 4 - Main power Ground - Battery negative

However, I am not getting any spark when firing with the test hardware function. The LEDS light up on the board when I am pressing the test function.

I started testing the pins of the speeduino with the multimeter, and on all the ignition pins I am only registering 3v. I assume because I am not getting 5volts out that is why I am not getting spark.

What could be a cause of only 3v out?

Cheers

[LPG2CV]

Looks like you need to set J1 (I think), to select 5v. So jumper middle pin to 5v.

[147_Pat]

Ah, that was obvious and simple...
My outputs now have 5v, however I am still getting no spark. Any other ideas?

[jonbill]

How is the speeduino powered?

[147_Pat]

Currently i just have it connected straight to a 12v battery.

[jonbill]

Well that should work then.
Can you share your tune?

[Alfagta]

I have some R8 ignition coils (06E905115E)

They are 4 wire smart coils and I have them wired up as follows

Pin 1 - 12v - Battery positive
Pin 2 - secondary ground - Speeduino Ground
Pin 3 - 5v signal wire - Speeduino ignition pins (7,8,33,34)
Pin 4 - Main power Ground - Battery negative

I think that is wrong for the R8 coils, these have a diffrent pinout compared to the other VAG 4 wire pencil coils.
The R8 should be:
Pin 1 - Gnd
Pin 2 - 5V trigger
Pin 3 - Gnd
Pin 4 - 12V
Both ground can be connected together to engine gnd.

[147_Pat]

Still having issues with bench testing my spark.
Tried swapping the pins around as per above comment, but that did not solve the problem.

Spark settings:

Spark output mode: Going Low
Cranking Dwell 4.5ms
Running Dwell 1.5ms
Spark Duration 1.0ms

Confirmed that the ECU is putting out 5v signal when using the hardware test function, I've check the spark plugs and they are good.

Am I just going about this whole thing wrong? The setup is as per the picture above. My understanding is that if everything is correct, I should be able to open the hardware testing tab, click on the spark driver output and should get the sparkplug to spark, or am I mistaken?