Vacuum leak question - 2.9l

[JohnG]

I have been chasing a vacuum leak. While changing lines I noticed that there is vacuum line going from the charcoal canister to the gas tank. If the gasket that is supposed to be on the gas cap is gone would that cause a vacuum leak?

 

[Uncle Gump]

Those gas caps are vented... it's just more vented now. So I wouldn't think so.

 

[19Walt93]

Check the one way valve on the brake booster. I needed a grommet for the booster on the 86 I'm working on and I had to buy a kit with the valve included,I discovered the old valve was shot when I checked it. I had never seen one fail before.

 

[JohnG]

Thanks guys.