MegaSquirt Volvo ECU Wiring Issues
Turbo Mini Forums

Chaps, im getting very close to firing up the Volvo Engine now.

Brett came over the other week and we managed to get a few bits buttoned up.

Injectors are now working and 5 injectors are running to 1 Input firing Batch Fire.

Im now struggling to get a spark, the Volvo runs a Dizzy Setup with a single coil.

Below is a diagram taken from a the Volvo wiring Diag. Now ive basically wired the 12v to 12v, the ground to chassis and the Output to ECU IGN1 on the Megasquirt, when going into the testing bit on TunerStudio I cant get an spark what soever.

Can anyone shed any light?

1/4 Mile 14.3secs 96Mph Terminal 10psi of boost.


Fibreglass Parts? - http://www.tdkracing.co.uk/
Split Rims? - http://www.force-racing.co.uk/

You'd probably be much better asking this question on the MS-Extra forum.

But which Megasquirt version are you running ?

The 5 cylinder question pops up occasionally on the MS-E forums and I've never seen an easy answer.

From what you've posted above that looks like some kind of ignition amplifier to fire the single coil but what are your crank/cam inputs to the Megasquirt to tell it when to fire ?

Schrödinger's cat - so which one am I ???

Hi Rod, thanks for the reply,

Its Ms2 Extra. Ive got a crank sensor, ive tested it using the tooth logger and it appears to be picking up a signal fine.

1/4 Mile 14.3secs 96Mph Terminal 10psi of boost.


Fibreglass Parts? - http://www.tdkracing.co.uk/
Split Rims? - http://www.force-racing.co.uk/

Mike,

If you're not already, get yourself registered on here
http://www.msextra.com/forums/index.php

5 cylinder engines are funny beasts as the two halves of the cycle (ie, every other revolution) is different and I "thought" the 5 cylinder engines used cam sensors (rather than crank) because of that.

I may be wrong but you're better off asking over there I think.

Not trying to put you off, but I certainly don't have the knowledge how to get an MS2 to run a 5 cylinder. Someone on the MS-E forums probably does though.

Schrödinger's cat - so which one am I ???

Rod is right: you need a cam signal for any 5-cylinder engine (or 3-cylinder engine). There is no other way to fire a coil every 144 degrees.

And do register on the msextra forum. There are many there who have already had to deal with the same thing and can give you much better advice.

http://www.jbperf.com/

Yeah I will guys. It also has a cam sensor too.

1/4 Mile 14.3secs 96Mph Terminal 10psi of boost.


Fibreglass Parts? - http://www.tdkracing.co.uk/
Split Rims? - http://www.force-racing.co.uk/

I used MS2 to fire a single coil and dizzy on my SPI Mini. 3 things I found:

1) I did something wrong when I assembled the engine and the dizzy was out by 180 degrees. Stupid, but then the easy thins are easy to miss. Bypass the dizzy and put the coil output straight to a single spark plug and see if it fires.

2) On my V3.0 board the driver was shorting out straight from the metal back to the PCB. I don't know how I managed that as the Mica insulator and bolt appeared to be positioned perfectly - but still something to check. A continuity check with a meter didn't show this up as it had to arc to short circuit, but the arc was visible with dim lights and higher dwell settings.

3) Get a Volt Meter and check continuity from the driver middle pin to pin36 in the connector. You need to solder a bridge soldered to connect them; I assume you've done this, but still check continuity as the wide copper track doesn't go right to the pins, but turns into 2 thin track right before the pin. With a high dwell setting, or some other wrong setting, there's a slight chance you could've blown those tiny tracks:



Also:

Make sure you can see 12V at the ignition pin (pin 36). If not, check at the coil for 12V to make sure you've actually tripped whatever relays / immobilisers you need to to get power to it. Also check the settings in TunerStudio. I can't remember the setting, but it lets you switch between pulling the ignition wire down to 0V to create a spark (for coils) or pulling the wire up to 12V (external ignition module)

Despite the injectors firing, make sure that Tunerstudio reports a good crank signal and cam signal. Just wondering if your setup only requires one signal for the injectors, but both for the ignition.

Edited by PhilR on 15th Jul, 2015.

He seems to say the engine has a distributor.

No cam sensor etc should be necessary unless the firing angles are not equal.

The distributor IS the cam sensor, so to speak.

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will

http://www.jbperf.com/

Schrödinger's cat - so which one am I ???

Meh, that is all lol,

Yes i moved to the darkside

Instagram @jdm_brett

Megasquirt does not yet support odd fire?!

http://www.jbperf.com/

Can anyone shed any light on the wiring?

Im guessing it wires to the VREF2 however my Cam sensor has 3 wires not 2?

1/4 Mile 14.3secs 96Mph Terminal 10psi of boost.


Fibreglass Parts? - http://www.tdkracing.co.uk/
Split Rims? - http://www.force-racing.co.uk/

Schrödinger's cat - so which one am I ???

Thanks for the info guys, I'll have a read tomorrow and try to get my head around it all

1/4 Mile 14.3secs 96Mph Terminal 10psi of boost.


Fibreglass Parts? - http://www.tdkracing.co.uk/
Split Rims? - http://www.force-racing.co.uk/

Mike, why are you not using the Volvo management?
I know the T5 engines can be remapped on the standard ECU etc to big power.

You're right I didn't understand. For some reason I was thinking the crank was flat plane and the cylinders were in a shallow V. Applying any real though, that wouldn't work anyway. I didn't think

Edited by Sprocket on 16th Jul, 2015.

I did try this to begin with, but Tom, you should see the loom pal. Its a sequence of utter nightmares haha.

1/4 Mile 14.3secs 96Mph Terminal 10psi of boost.


Fibreglass Parts? - http://www.tdkracing.co.uk/
Split Rims? - http://www.force-racing.co.uk/

Chaps, looking at this diagram.

The Brown and Black is Sensor Ground.

And the one the Power and Other Sense. So the sense would go to a Spare Input right?

Attachments:

803.93kb

1/4 Mile 14.3secs 96Mph Terminal 10psi of boost.


Fibreglass Parts? - http://www.tdkracing.co.uk/
Split Rims? - http://www.force-racing.co.uk/

Ive added as an attachment as its quite small

1/4 Mile 14.3secs 96Mph Terminal 10psi of boost.


Fibreglass Parts? - http://www.tdkracing.co.uk/
Split Rims? - http://www.force-racing.co.uk/

Mike,

I've added what I can to your thread on the MS-E forum.
I'd suggest you repost the screenshot you deleted, it might help others answer the rest of your questions.

Schrödinger's cat - so which one am I ???

To be honest Mike my approach would be to sit there with the standard Volvo stuff and unpick the loom to get it down to the bare bones you need to run the engine.

Or stick a diesel in it....

Problem is tom, the ecu is in 2 halves. One side to the engine and other to car, and the central locking shit and alarm/transponder is all interlinked.

In would have to use like most of the loom to make it work and it would be a right mess within the car.

1/4 Mile 14.3secs 96Mph Terminal 10psi of boost.


Fibreglass Parts? - http://www.tdkracing.co.uk/
Split Rims? - http://www.force-racing.co.uk/