@ Xplorer
Experience wat?
They just tune up your car, by checking exhaust emissions to set carburetor settings , so that car consumes less fuel On IDle Mode and at high rpm mode.
Thats It!
They tune the car in such a way that ,when in idle mode, u don't even feels that engine is ON.
I will look for report that i got when i tuned my car through enercon, if found i will post it here.