View Full Version : Pressure release when refueling?

April 9th, 2008, 14:38
When I fill up and remove the gas cap, there is a huge pressure release. Itís like my gas tank has formed a vacuum. Anybody know what this is and is it dangerous to me or my Jeep?

April 9th, 2008, 14:40
go to a parts store and get a vented gas cap .. you either have the wrong one or the vent is blocked up

April 9th, 2008, 14:51
its supposed to do it. your emissions system pulls a vacuum on the tank. On newer cars it will throw a code if the system is malfunctioning.

Kyle Petterson
April 9th, 2008, 15:07
Just don't huff it or smoke near it.

April 9th, 2008, 16:19
Well its a 93 and it hasnt started doing it until recently seeing how I have been fueling it up for the last 8 years. So I am guessing that the vent is blocked. is there any way to clear it out?


April 9th, 2008, 20:34
i wouldnt worry about it, a vacuume line probably wore out up near the motor, check the ones going to the canister on the passinger side firewall. That is the evap canister.