Ecumaster forum

Hi,

i have an issue with the Golf 4 1,4 Coil Pack 032 905 106b. This coilpack has internal drivers and has 4 pins (12V, Power-GND, Sign1, Sign2). The signal wires are connected directly to the EMU and in the ignition options the the Option "coils with internal drivers" is selected.
The ignition events have the corresponding Ignition outputs selected. This should be all that is needed to get a spark while cranking, but this is not the case.
Unfortunately i get no spark. The rpm signal reads while cranking, 12V on the Coil pack does drop to about 10V while cranking, which should be no issue.

What i did test is the following:
With the Option "coils with internal drivers" there should be 0V with ignition on and engine off. I get there about 0,6V - 1V, which still shoud be ok. When i change the option to "coils without internal drivers" and the coil unplugged, there should be a constant 5V on the signal wired (because signal is inverted), but this is not the case. There must be something with the ignition output.

Do i have to mess around with a pullup resistor on the signal wires? it seems odd that my multimeter reads 0,6V at the signal wires while engine off and "ignition with internal drivers".

I read, that the new firmware has a output test mode. At the moment i have the current release (1.1). If i upgrade to the experimental client, do i also have to update the ECU Firmware to get the test mode? I assume the settings on the EMU will get lost, yes?

Thank you

I think you are not right, or not fully understand what you are doing.

If you will really use "DUMB" coils they will become +12V on one side and you can measure 12V also on the EMU side if the coil if they are not switched on (and they are not if the engine is stopped).

If you use "SMART" coils, they use TTL logic. So i think the EMU side should be "ON" if you select smart coils, and "OFF" (grounded) if the MEU will fire the Coil.

Clear ?

if you use dumb coils, then the emu has to ground the coil to charge the coil. maybe you are right and in this case i would not see 5V on the signal pin but 12v when coil is not fired, because in this case it uses no ttl. But that is not relevant for this issue. This coil has internal drivers so the emu should usw TTL signal --> That means it will give 5V to the driver in the coil, when the coil should charge.

So when there is no rpm signal, there must not be 5V at the signal wire because this would charge the coil permanent and kill it.
Does anybody have use these coils with EMU? I think there could be a pullup issue? On megasquirt 2 you have to use a 1k pullup to 12V to make that coil work, the internal 5V pullup is not enough.

I am using many VAG/Bosch coils without issue. Just selecting "Smart Coils" , DWell at full voltage max 2,5ms and correct wirring .... no issue at all.

hmm with r32 single coils i used on another emu everything was working correctly. I never used this bosch 032 905 106b on an emu but on some megasquirt cars and there it worked properly, too.

I am not sure if i could just add a pullup to 12V right at the connector, i better dont mess with that. Is there another coil you could recommend? Maybe switching to another coil will be better.

Thanks alot

just be carefull, for example the coils used in 1.8Turbo has the same plugs like the coils from 1.4TFSI and 2.0TFSI .... but they have different connection. Never needed pullup on EMU, until you use them in wastespark 2coils on one output

ah ok thank you. i asked the emu tech support, maybe they can help before i change the coils. Thank you for your help!

no problem at all with this coil
i use always when i have wasted spark setups

Hi,
to finish this topic, it was a user fault The cam input was activated so the ecu waitet for a cam signal while there is no cam sensor installed. Turned the cam signal off now the coil will fire.