Sometime next year, Garmin nuvi GPS devices will have the option of displaying information on your car’s inner workings using EcoRoutes ESP —a module that taps into your car’s onboard diagnostics (OBD-II) port. The module relays this information to your GPS unit via Bluetooth where you will be able to view a set of customizable gauges that provide details on things like fuel economy, RPMs, throttle position, intake manifold pressure, coolant temperature, intake air temperature, and emissions. Awesome? Read more ...