Signal from the engine running !? Is there a signal in the Audi 80 b4 that the engine is running ? I would like to pick up with my carpc so that the start of the engine stops automatically when the engine is on !? is that possible ? a friend meant many times over speed meter that the one detectable signal gives in the form of 1 volt or something Oo (have an automatic, have no speed indicator Oo for that ne giant clock Oo xD )