Quote Originally Posted by torogi kid View Post
ok ito a, how does this work?
It's basically a vacuum gauge. The higher the manifold vacuum pressure, the better fuel economy you get. At zero pressure, it pretty much means your throttle is open 100% or near that.

The gauge works pretty much as a feedback system to the driver. It would tell the driver if what he is doing will give good or bad fuel mileage.


where will you install the gauge?
The gauge can be installed anywhere on your dashboard, best in plain view. You will need to have a hose attached from the gauge to your car's intake manifold. You would need to find an unused vacuum "port" or use a T-fitting to splice into an existing vacuum line.


will it tell instantly that the driver has a heavy foot, or after a period of time?
The gauge will immediately tell the driver if what he is doing will result in good or bad fuel mileage.