Hello!
I have a problem and i hope some one can give me some tips.
I was running a pnp audi s2 vems and all was perfect.
I removed all the original Audi wiring looms and made a new engine loom.
All is good now but i have one problem. As soon as the VEMS APP connects to the ECU my fuel-pump starts running and the engine wont start.
If i start the engine without the vems app connect-it the engine starts fine but as soon as the vems app connects to the ecu it stalls.
How is this possible?
Tanks
Forgot to say. I have no problems at all when running VEMS Tune.
You also forgot to say exactly which versions of the ECU firmware, VemsTune and the app that you are using.
Sorry! I will go to my car tomorrow to check it and let you know.
Had a look at the car today and noticed it was my one mistake!
Because it worked fine before i did the wiring i looked first to the thing i changed.
Before i had a USB powering the VEMS Bluetooth adapter. I had a look inside the Bluetooth adapter and i noticed pin9 on the RS232 connector was connected to the positive 5v connection.
I thought it would by very nice and clean to get the power from the RS232 connector so i don't need a separate USB anymore. So i connected the 5v from the VEMS on pin 9 8) works nice and the Bluetooth adapter powered up!
But then a the problems happened. fuel pump starts running and car wont start.
I disconnected the 5v from the vems and powered the adapter from a USB and all works fine now! :p