Fuel Pump Vent Connection
Thread Starter
Staging Lane
Joined: Oct 2007
Posts: 58
Likes: 0
From: Mill Creek/Lynnwood, WA
Fuel Pump Vent Connection I am installing a fuel pump from a 2001 Trans Am into a new stainless steel tank. I know that one of the connections is the feed and one in the return. Is the smaller connection in the center a vent? Can I just run a vent line to that connection or do I have to provide a vent for the tank? Someone told me I should use a vented gas cap.
Staging Lane
Joined: Feb 2011
Posts: 95
Likes: 0
From: Detroit, MI
The middle port coming off the top of the fuel module assembly is indeed a vent port, you can see a light blue 'ROV' Roll Over Valve installed underneath it. The ROV is a float mechanism that remains open, providing a vent, unless you roll over the car, or your tank is completely full and sloshing up closing the float. This port can be T'd into the main vent line and then routed to a carbon canister and then to atmosphere, or back up through the filler tube, whichever way your new stainless tank is being vented.
