I have seen that some of you allready have the VEMS running on the Audi I5 so i think it is possible to Trigger the Timeing with the Hall sensor on the Camshaft pulley and the Engine Position Sensor on the Flywheel. My Question on you is: Are you Using the stock ABY-AAN-ADU ignition system-Coils-Stages?
Hi Vasilis,
We have run VEMS on several different (3B/AAN/ADU) I5 Audi engines in here. We've always used PlugNPlay adapter to connect VEMS to original motronic wiring/sensors and it's possible to switch back to original system in a few minutes.
Some notes according to my current knowledge:
- Stock coils and end stages are used. However, VEMS has capability to run dummy coils too (IGBTs inside ECM) so it would be possible to get rid of the amazingly expensive end stages.
- Can this be done when they fail?
- Stock sensors are used
- Engine ref position sensor polarity needs to be swapped (easy to do inside firewall connector)
- Intake air temperature PTC has very flat temperature/resistance curve, for better resolution some other sensor would be worth to think (or order with different bias resistors on board => standard is 429..430 Ohm pullup for the AAN/ABY/ADU pinout)
- I think i could use also another one (What do you suggest) connected to the stock Intake Temp Sensor harness in oder to change easy to Motronic for Diagnostic reasons.
- Onboard computer is not showing fuel consumption etc
- 0..5V analogs output are connected to the fuel consumption and the boost input signal pins of the trip computer. It is under investigation though. If you have some knowledge about it (or can experiment by a variable resistor sending in 0..5V signal and see what the trip computer thinks), please share
- Sorry dont know much about it but i could try to find out (RS2 has: Instand fuel consumption, Kilometer till no fuel, Liter consumed since Ignition turned on, Time of the Trip, average consumption, something else i cant remember now).
- 0..5V analogs output are connected to the fuel consumption and the boost input signal pins of the trip computer. It is under investigation though. If you have some knowledge about it (or can experiment by a variable resistor sending in 0..5V signal and see what the trip computer thinks), please share
- Starting while cranking is not as quick as with motronic, but it's mostly due inproper tuning
- my 3B starts in appr 2 cam revolutions, using 5/2 msec cranking pulsewidth (cold/hot, fire all banks during cranking). How quick is motronic ?
Regards,
I placed some questions-asnwers above. Can you please help me then make a new part list i need to buy. Maybe a frind with an RS2 is Greece is also going for this.