Gas tank pressure?

(Jason Miller 1993 XJS 4.0 convertible, 1997 XK8 coupe ) #1

Hello everyone! Just curious if this is usual or not. I have had a couple of times where when I get gas, there is a shhhhhhhhhhhhh as I release the cap on my 1997 XK8. Yes, I mean there is some pressure in the tank. Anyone else have this?

(Grahame Loader) #2

I cannot think of any reason why there would be pressure in the tank. What you may hear is a partial vacuum being released. That could be caused by a restricted vent. If you hear this right after driving the car, that’s what you would be experiencing.