[Tig]

Good info Kevin, thanks.
My son and I just installed a remote starter in his truck. It had a virtual tach setting, and two different tach sensing settings. One was for weak signals. There wasn't much detail on the virtual tach operation but at a glance it sounded like there would be no sensing and the starter would just assume the engine had started. There was no wire required for virtual tach. We ran the wire and used tach sensing.