Join Date: Sep 2009
Location: Brownsville, TN U.S.A.
Yes, it's very possible. Vac gauges are an old school method of improving mpg. Most now come with three wires out the back, red, black and orange. The orange is for a lighted gauge and usually goes to the stereo wiring harness. There is also a clear plastic tube and a hollow Tee with most aftermarket models that you splice into a vacuum line close to the intake manifold and run thru the firewall. It's not too hard to install one.