When asking for technical help at the very least let us know the version of firmware you are running.Cliff's Calibration (Mapping) Guide is a MUST READ: http://www.vemssupport.com/forum/index.php/topic,97.0.html
I've read on this board that a diode is needed on the oem bosch Audi RS2 ISV valve to make it work with VEMS. Can someone elaborate?Thanks