Main.TrailIndexPage | Fuel System | Fuel Vapor Tank

Fuel Vapor Tank

This component is part of the Fuel System.


The Fuel Vapor Tank is also know as the "Fuel Compensating Tank"... These were installed starting with the 1970 model year. This tank is an emission control device in that it aids in the evaporative emissions to be lead back into the engine via the venting line. Prior to the 1970 model year, the evaporative emissions were simply routed out of the trunk and into the ambient atmosphere.


The fuel vapor tank's function is to vent the fuel tank. This tank also serves to capture excess fuel if the fuel tank is completely filled. As fuel is used, the excess will simply drain back into the gas tank.

The following diagram shows the flow of the vapor through the tank and into the engine crank.

< Air Filter | Main.TrailIndexPage | Eliminating Fuel odor in the trunk >