Originally Posted by tpi
This device is not the path to improved fuel efficiency. The ECM is already designed as necessary to work properly, and will not give up a 15% efficiency loss.
ECM may be designed to "work properly", but there was a time before ECU\ECM had emerged as a concept that the substitution of electronic fuel injection systems for carburetion was the be-all of electronic control.
More recently, for years now every automaker in the world has had engineering teams working to reverse-engineer "Trionic", Saab's revolutionary system for controlling automotive operations which make ECU seem like hand-cranking.
No small tweaks possible upon today's systems? There's always a tweak to be had.