Gas Leak (only when engine has been running) - Suzuki Forums: Suzuki Forum Site
Suzuki Forum Suzuki Forums

» Auto Insurance
» Featured Product
Wheel & Tire Center

Go Back   Suzuki Forums: Suzuki Forum Site > Suzuki Models > Suzuki Jimny, Sierra & Samurai Forum
Register Home Forum Active Topics Photo Gallery Garage Search Today's Posts Mark Forums Read Auto EscrowAuto LoansInsurance Advertise

Suzuki-Forums.com is the premier Suzuki All Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Display Modes
Old 05-05-2014, 08:01 AM   #1 (permalink)
Newbie
 
Join Date: May 2014
Posts: 14
Gallery: 0
T_Thomas is on a distinguished road
Default Gas Leak (only when engine has been running)

88 Samurai. Starts and runs fine, but develops a gas leak after the motor has run for long enough to develop some pressure inside the tank.

Steady drip at right rear of vehicle under tank. Leaks enough to put about an inch of gas in the bottom of a pickle jar, then stops. (About 5 minutes.)

Any ideas?
T_Thomas is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 05-05-2014, 09:37 AM   #2 (permalink)
Newbie
 
Join Date: May 2014
Posts: 14
Gallery: 0
T_Thomas is on a distinguished road
Default

More Info:

Just discovered that it also leaks the same way when sitting outside in sun.

When I took off gas cap there was a noticeable pressure release from tank inlet, and the dripping stopped immediately.


So, obviously the tank is building pressure (either from running or heat buildup) and pushing gas out some orifice near the tank.

I will try a new cap to see if that fixes the issue, and remember to loosen the cap to relieve pressure when I stop in the meantime.

It doesn't seem right that the vent line should just go to the ground, though. Does anyone have any ideas on what else might be going wrong?

Thanks
T_Thomas is offline   Reply With Quote Quick reply to this message
Old 05-05-2014, 10:13 AM   #3 (permalink)
Senior
 
Azelgin's Avatar
 
Join Date: Oct 2010
Location: S. E. Arizona
Posts: 264
Gallery: 0
Azelgin is on a distinguished road
Default

The cap is supposed to hold pressure.
There are five hose connections to the fuel tank.
1) Fuel supply line - pulls from bottom of tank. Not a likely source of leak. You would usually have running problems, as the fuel pump would suck air. It is possible, that that a cracked hose would only leak under pressure and not under vacuum, but not very likely.
2) Vent line to fuel fill - Not a likely source of leak - Fitting is above fuel level, unless tank is overfilled.
3) Vapor canister line - Not a likely source of leak - Fitting is above fuel level, unless tank is overfilled. Vapor canister is behind right rear wheel well, in cargo area.
4) Fuel pump return line - Possible source of leak - Tank pressure would force fuel out of loose connection, or, crack in hose. Fitting to tank enters top, but its possible for return fuel from pump to leak out.
5) Fuel fill hose - My first choice. - Fuel hose enters side of fuel tank and is full of fuel, with tank level above 1/2 full. Expanding fuel could push past loose clamp, or, out of cracked hose.

Hope this gives you some places to check.
Azelgin is offline   Reply With Quote Quick reply to this message
 
Old 05-05-2014, 10:36 AM   #4 (permalink)
Newbie
 
Join Date: May 2014
Posts: 14
Gallery: 0
T_Thomas is on a distinguished road
Default

Thanks for the helpful info.

The leak is very focused - I mean like it is dripping straight from a hose instead of leaking from the top of the tank and running down. The drips would probably all go into a Coke bottle once you had it in the right place.

I guess I just need to try to inspect the tank area and see what I can find.
T_Thomas is offline   Reply With Quote Quick reply to this message
Old 05-05-2014, 10:50 AM   #5 (permalink)
Newbie
 
Join Date: May 2014
Posts: 14
Gallery: 0
T_Thomas is on a distinguished road
Default

Problem identified. Not from the tank at all. There is a cut in the short piece of fuel line going into the rear side of the fuel filter. Looks like it will be a cheap easy fix.

Thanks
T_Thomas is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

  Suzuki Forums: Suzuki Forum Site > Suzuki Models > Suzuki Jimny, Sierra & Samurai Forum

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Suzuki Forums: Suzuki Forum Site forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
Insurance
Please select your insurance company (Optional)

Log-in



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may post new threads
You may 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


Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 11:29 PM.



Powered by vBulletin® Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.6.1
Garage Plus vBulletin Plugins by Drive Thru Online, Inc.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.