XJ6 & XJ12 Series I, II & III 1968-1992

fuel pouring out of gas cap

 
  #1  
Old 12-11-2011, 10:23 PM
Junior Member
Thread Starter
Join Date: Aug 2011
Location: Fort Mill, SC
Posts: 25
Received 1 Like on 1 Post
Default fuel pouring out of gas cap

I bought a 82 xj6, will add it to my garage later, starts up flawlessly but when i switch to the right tank gas starts spewing out of the gas tank at the gas cap. Has anyone had this happen and how were you able to fix it? Runs perfectly when on the left tank. Thanks in advance.
 
  #2  
Old 12-11-2011, 10:49 PM
Veteran Member
Join Date: Mar 2008
Location: Pacific Northwest USA
Posts: 20,147
Received 6,547 Likes on 4,859 Posts
Default

Spews fuel out of which tank?

You probably have a problem with the changeover system. A typical scenario is that fuel is being drawn from one tank but being returned to the opposite tank...causing the opposite tank to overflow.

Fuel Tank Switchover Checklist, Series III XJ6

Cheers
DD
 
The following 2 users liked this post by Doug:
alyree (12-12-2011), Andy Paine (09-01-2018)
  #3  
Old 12-12-2011, 11:40 AM
Junior Member
Thread Starter
Join Date: Aug 2011
Location: Fort Mill, SC
Posts: 25
Received 1 Like on 1 Post
Default

Thanks for info, I will be doing some testing tonight. It spews fuel out the right side tank when the switch is changed to the right side.
 
  #4  
Old 12-12-2011, 01:23 PM
Veteran Member
Join Date: Mar 2008
Location: Pacific Northwest USA
Posts: 20,147
Received 6,547 Likes on 4,859 Posts
Default

Originally Posted by alyree View Post
Thanks for info, I will be doing some testing tonight. It spews fuel out the right side tank when the switch is changed to the right side.

I *suspect* that, with the right tank selected, fuel is still being drawn from the left tank but unused fuel is being returned to the right tank....thus overfilling it.

Cheers
DD
 
  #5  
Old 12-12-2011, 04:27 PM
Junior Member
Thread Starter
Join Date: Aug 2011
Location: Fort Mill, SC
Posts: 25
Received 1 Like on 1 Post
Default

do you believe it to be the return sending unit? or is it the change over sending unit?
 
  #6  
Old 12-12-2011, 07:44 PM
Veteran Member
Join Date: Mar 2008
Location: Pacific Northwest USA
Posts: 20,147
Received 6,547 Likes on 4,859 Posts
Default

Originally Posted by alyree View Post
do you believe it to be the return sending unit? or is it the change over sending unit?
My guess is that the return valves are OK but the changevoer valve....that's the one just aft of the spare tire...is faulty.

Cheers
DD
 
  #7  
Old 12-15-2011, 09:49 AM
Member
Join Date: Mar 2011
Location: San Luis Obispo
Posts: 73
Received 5 Likes on 5 Posts
Default

I just went through the same thing, you need to remove both of the rear wheels. There is a cover over the valve, remove both valves and keep the separate. Put 12 volts to them and one will close with 12 volts and one will one with 12 volts. If they do nothing when you apply 12 volts you need new one. I saw them on parts geek.com for around $40.
 
  #8  
Old 12-15-2011, 04:32 PM
Fraser Mitchell's Avatar
Veteran Member
Join Date: Dec 2009
Location: Crewe, England
Posts: 7,340
Received 1,573 Likes on 1,310 Posts
Default

The changeover valve in the spare wheel well can be troublesome.

I remember going up a long hill near Burford in the Cotswolds in the early 90s with my Series 3 returning from holiday, trunk absolutely full up. Low on one tank so hit the fuel changeover switch - did not work, so struggled into a layby halfway up, and had to unload the whole trunk load !! A quick couple of taps on the valve body got it switched over, and away we went after reloading the trunk. Tap time = 5 seconds, unload/reload trunk 10 minutes.
 
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Russ Graber
S-Type / S type R Supercharged V8 ( X200 )
12
02-23-2019 11:59 AM
Shaggy9212
XJ40 ( XJ81 )
12
09-14-2015 08:08 PM
1964Daimler
MKI / MKII S type 240 340 & Daimler
4
09-09-2015 04:50 PM
hen555
XF and XFR ( X250 )
2
09-07-2015 11:13 PM
alpecsa
XJ6 & XJ12 Series I, II & III
17
09-07-2015 11:55 AM

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

Thread Tools
Search this Thread
Quick Reply: fuel pouring out of gas cap


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: