i've had 2 or 3 cars that i've worked on that you still needed tach in order for the car to keep running. If i remember right the first one was a 99 ram. Would die out instantly. Then from there i hooked up tach, programmed it and was good to go. Had af ew others but can't quite remember what ones. Since then i still hook it up on all of them.Broadfield wrote:If it doesn't learn tach than either you are not learning it correctly or you may just need to go to an injector wire. Injector wires will always work..... where as I have had a tach or two that didn't. Just go to an injector wire that is not common among all injectors. Or set it to voltage as Converted said. However, it may not remote start in really cold weather if it's set on voltage. That's the great thing about the new Viper systems...... you never have to tap a tach signal again! Give me a call if you are having anymore issues. It's a lot easier to give tech help over the old telephone