Fuel system over pressurizing - Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > YJ Jeep Wrangler Forum > YJ Tech Forum

Join Wrangler Forum Today

Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 07-27-2008, 09:04 AM
Thread Starter
Join Date: Jul 2008
Posts: 1
kmssg is on a distinguished road
Fuel system over pressurizing

I have a 1991 YJ that is having a serious problem with the fuel system over pressurizing. I have not put a guage on it to see what the actual pressure is but when I remove the filler cap the pressure inside the tank will almost blow the cap out of my hand. The Jeep runs great which is part of the reason I'm confused by this. Does anyone have any suggestions as to what may be causing this?
kmssg is offline   Quote
Old 07-27-2008, 02:40 PM   #2
Melba Toast

WF Supporting Member
::WF Moderator::
Coyote_94YJ's Avatar
Join Date: Feb 2008
Location: Montana
Posts: 20,944
Coyote_94YJ is on a distinguished road
Send a message via ICQ to Coyote_94YJ Send a message via Yahoo to Coyote_94YJ
I think that you'll find your fuel pressure is just fine and that your problem is in the vent line off the top of your tank. There should be a line that comes off the top of the tank and goes to the carbon canister under the hood. Something is plugged in there somewhere. Disconnect the line at both ends (the canister and the tank) and see if you can get compressed air through the line.

Or try getting a vented gas tank cap.
2000 TJ Sport
Coyote_94YJ is offline   Quote

Thread Tools

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 Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
check engine light came on and speedo stopped working @ the same time. eric TJ General Discussion Forum 14 10-14-2013 12:05 PM
95 YJ Fuel Pump, no power at connector? snb73 YJ Tech Forum 6 06-06-2013 03:02 PM
CPS or fuel system--help BlackJeepoftheFamily TJ General Discussion Forum 14 03-11-2011 04:00 PM
Fuel Pump? jjonesx2 YJ Tech Forum 5 01-22-2008 08:32 AM
No power to my fuel system? the idiot magnet YJ Tech Forum 3 03-18-2007 04:27 PM

All times are GMT -5. The time now is 10:33 PM.

User Alert System provided by Advanced User Tagging v3.1.0 (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.

Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, and Grand Cherokee are copyrighted and trademarked to Chrysler Motors LLC.
Wranglerforum.com is not in any way associated with the Chrysler Motors LLC
« Back

Enter your email address:

Delivered by FeedBurner