Ignition Module Switch Audi 7A 20V - where is placed?

[mihai_antony]

Hello

I have a b4 with a 7A motor swap and i have big problems with starting the engine, a lot of no start, or hard starting and misfiring.

I've changed almost all the stuff, OE or Bosch
- new dizzy, correct alignment
- new sensors (the two from flywheel and the coolant sensor from the back)
- new coil
- ignition contact
- ECU
- pin from the FW it is ok
- battery it is ok

Knock sensors - didn't changed but i don't belived that they influence the start of motor.

All the wiring, from ECU to sensors, to coil, to MAF, to ground - everything is ok but no spark, or hard and random starting. When i have spark and finally the motor start the idle is ok, engine is running ok. If i stop and i want to start again - i have no spark..it's a crazy

The problem is that the spark from the coil is random, i have the power on coil but no start or spark. I've seen one thing: when i turn on the contact the voltage is low (9.4-9,5V)

I read a lot on the forums and the problems could be from the ignition module switch (amplifier), but the problems is that i didn't fiind this module in my car. Maybe previous owner miss to put when the swap was made?

Please help with a picture in order to know where should be placed,

Thank you very much!
Mihai

[mihai_antony]

and the code is 191905351B

[Mikes2]

20v cars don't have that module

[mihai_antony]

Thank you Mikes2!
i will go ahead with further investigations, but i'm really out of options. Check again all the fuses and relais

[Mikes2]

One thing to check is the wiring inside the boot of the connector at the distributor. If that is damaged, you will not get spark

[SA BOY]

Are you sure it is not a fuel problem?

[mihai_antony]

Hello

Can be a fuel problem if i have no spark from the coil?
The fuel pump is working, fuel pressure ok

[UrS4boy]

7A Ignition Coil with Power Output Stage PN

20v cars don't have that (191905351B) module

Agree. 7A's had a 8A0905105 coil with attached power output stage (POS) module. Yours might be dead.

http://www.ebay.com/itm/BERU-Germany...-/111439430542

[Bowie69]

That's the one, I have one on the shelf for when mine dies!