hi everyone,
i own a 1988 v12 vanden plas and all of a sudden over the past few weeks i have to vent the driver side gas tank in order to start vehicle??
this is very frustrating and would appreciate any help.
thanks in advance.

 

i thought i would mention when i do release the gas cap, there is a lot of whoosh coming out...

 

Behind the right front wheel, attached to the inner part of the wheel well, you'll see a couple pipes.

One one of them...the one that runs horizontally...you should see a small plastic valve. This is the vent valve for the tanks. Disconnect the valve on the aft side; that is, if your looking in the wheelwell and see the valve on the horizontal pipe, you want to disconnect it from the pipe on the left side, so that the end of the pipe is open to atmosphere.

Assuming no clogs in the pipe your tanks are now vented to the outside world at all times.

Post back if anything changes.

Cheers
DD