Only able to use 2 ing channels

[se7ensport]

Just got a new VEMs unit with 6+2 ignition.  In test mode I am only able to activate ign channels 2 and 3, the firmware is 1.2.1 with settings imported from 1.1.96 (my old unit).

I've uploaded my config in the sharing center, what do I need to do to enable the other 4 channels?

http://vems.hu/vemstune/sharingcenter/reports.php?cmd=view&key=vUVFaj

They are physically in the unit.

Thanks
Alex

[mattias]

So this is your setup ?


In your config you have dual-out enabled and you're only using 2+3 and 6+7.

What doesn't work and what is attached to those outputs?
Relays, passive coils, active coils?

Oh, and firmware 1.2.1 is intermediate non-release only for audi 135 tooth "c270 divbyN" (N=9, 27 or possibly 3)
Use 1.2.0 unless you know what you're doing.
http://www.vems.hu/wiki/index.php?page=GenBoard%2FUnderDevelopment%2FFirmwareChanges

[se7ensport]

Yes that's my set-up.

I am running wasted spark using COP with intention of going to fully sequential once secondary trigger fitted.

I can only get pins 34 and 36 to work in test mode, I have tried 33, 35, 24 and 10 without success.  I've swapped the pins over to check the harness and it is consistently ch2 and ch3 that works.

My mistake on firmware version, it is actually 1.2.0.

[mattias]

Unplug the ECU, turn the ignition on. Measure voltage between ground and the ignition output pins in the harness. Tell me what you see.

Here is also an opportunity to test-fire passive coils by applying a ground wire to each pin. No spark with this method, and the ECU won't be able to do any better.

You didn't answer my question, are your coils active or passive?

[se7ensport]

I haven't tried to fire the coils using VEMS, I have 4 test bulbs instead that I used successfully to check the injection, they also confirmed only two ignition channels as currently active when using the test function in VEMSTune.

Sorry, they are passive 2-wire coils from a Ford Focus.

I get 12.6volts on all four outputs with the COP connected, ignition on and VEMS unplugged.  Grounding fires them.

[mattias]

Try enabling each ignition output to be used as one of the misc output functions, inverse the function to activate the output. This should  light up the bulb for as long as you have the output active. Don't do this with actual coils as you'll either burn out the fuse for the coils, and if no fuse then either the coil or IGBT.
I would open up the frontplate of the ECU and check what IGBTs are actually mounted on the board as well.

[se7ensport]

Using misc output I can get each one to light up.

So I then turned off dual-output, I could the get three of the channels to fire; pins 34, 36 and 24.  My guess is that something isn't right with the config I have loaded.  Tomorrow I'll re-load the latest firmware and start from scratch only importing lambda, VE and ignition tables.

[se7ensport]

Just spent another 2 hours this morning trying different config options including loading the latest firmware and then the original config it came with, I still can only get ch2 and ch3 to fire in test using dual output mode.

[mattias]

I would open up the frontplate of the ECU and check what IGBTs are actually mounted on the board as well.

[se7ensport]

I would open up the frontplate of the ECU and check what IGBTs are actually mounted on the board as well.

I took the front plate of and described the content to Rob, it looks as though they are there. 

I also loaded your config from your signature, this hasn't worked either, it is now in the post to Rob.

Thank you for your input.

Alex

[mattias]

And if you crank the engine, will any other than pin 34+36  fire a coil? (ignition plugs properly grounded and no trigger errors)

I assume you're using the very latest "nightly" VemsTune ?

[se7ensport]

Latest version of VEMSTune, I wasn't going to try cranking until test mode confirms that they do fire.

[mattias]

 Try cranking. Doesn't really matter, just don't add fuel until you know what's up.

[se7ensport]

Rob has run it on his test rig and it works.  The only difference is that I used bulbs on my test set up and he uses LEDs which are significantly more responsive, this doesn't really explain why I could light 2 channels in test.  Just looking forward to connecting it up and getting the car running again.