The Ford Barn

Redbird · 08-26-2021, 06:44 PM

Higher the vacuum the better the gas mileage. Work the pedal.

JoeCB · 08-26-2021, 08:45 PM

I had a 1979 Cadillac Seville, that had "fuel economy" lights in the instrument panel. Two little lights, orange and green. They were simply wired to a vacuum switch. High vacuum > green light. Low vacuum > orange light. For a driver that has a heavy foot, they were helpful.

Joe B

08-26-2021, 06:44 PM	#1
Redbird Senior Member Join Date: Feb 2015 Location: Georgetown, TX Posts: 536	Re: Vaccum Gauge Higher the vacuum the better the gas mileage. Work the pedal.

08-26-2021, 08:45 PM	#2
JoeCB Senior Member Join Date: Nov 2018 Location: Farmington MI Posts: 366	Re: Vaccum Gauge I had a 1979 Cadillac Seville, that had "fuel economy" lights in the instrument panel. Two little lights, orange and green. They were simply wired to a vacuum switch. High vacuum > green light. Low vacuum > orange light. For a driver that has a heavy foot, they were helpful. Joe B