My last successful history was an Opel Corsa 2 generation with 1800cc engine 60-2 trigger wheel, VR sensor, this sensor was my nigthmare about two weeks, i did't find the correct LM1815 circuit, i tried almost every configuration, searching in MS forums i found the first step, 100k resistor addition, later i put one pot on 14 pin, and i found the correct resistor value.
The Corsa has turbo, and works very well, with DSM 450cc injectors
