Gas Tank Under Pressure - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat
GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat

Go Back   GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat > Pontiac Bonneville > 1992-1999

1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

LinkBack Thread Tools Search this Thread
Old 10-20-2004, 10:27 PM   #1
Senior Member
True Car Nut
Join Date: Jan 2004
Location: Lakeville, MN
Posts: 4,328
Thanks: 0
Thanked 1 Time in 1 Post
fantastic88 is on a distinguished road
Default Gas Tank Under Pressure

Yesterday my 97' broke down and had to be towed. At the shop they said that the fuel sender had gone bad causing the fuel pump to burn up. The job was near $1000, thank god for the warrenty. Anyways, they only filled the tank with two gallons of gas. Not to mention the car no longer performes the way it did. So, I filled the tank up and the performance improved slightly. The one thing that worries me is now whenever I loosen the gas cap it hisses like a soda bottle being opened. Is my gas tank under pressure and what could be causing this?
1997 Olds LSS Supercharged. 262hp and 340ftlbs. 1/4- 15.1@ 92.04mph (stock), 2.38 60ft. Nope, I can't drive. 125,000 miles. White. Interior equipment; dual 8 way Aurora leather power seats w/ lumbar, two tone interior, theater dimming lights, CD and Cassette w/ Concert Sound III (nice), steering wheel controls, sun/ moonroof, ect. Mods: 3.5", high flow cat, 1:9s, and gutted air box w/K&N filter.

2006 Ski Doo 500SS MXZ. The 500 with the 600 motor
fantastic88 is offline   Reply With Quote
Old 10-20-2004, 11:04 PM   #2
Senior Member
Posts like a Turbo
Join Date: Jul 2004
Location: Woodstock Ill.
Posts: 214
Thanks: 0
Thanked 0 Times in 0 Posts
Ranger is on a distinguished road

your gas tank isn't under pressure, it'* under a vacuum. Fuel is being drawn from the tank but not being replaced by air, thereby creating a vacuum. That also puts a load on the pump. Are you sure they put the correct (vented) cap back on? If so, look at the purge valve/solenoid. It'* part of the evap system in the manual (if you have one).
Ranger is offline   Reply With Quote

Similar Threads
Thread Thread Starter Forum Replies Last Post
Gas leaking from top of gas tank on 89 Bonne crazycrawler 1987-1991 6 03-24-2010 11:19 PM
Sometimes won't start if under 1/4 tank? zecc81 1992-1999 6 04-09-2009 02:22 AM
Surge of pressure into gas tank when turning car off reb 1992-1999 8 04-15-2008 04:40 PM
fuel smell and excessive tank pressure goertz 1992-1999 8 07-21-2006 05:17 PM
Car runs like doo-doo under 1/2 tank of gas... DJ SHO 1992-1999 10 03-27-2005 12:07 PM

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

All times are GMT -4. The time now is 12:40 PM.