Looks like fuel pump is broken --- true? - JeepForum.com
LinkBack Thread Tools
post #1 of 5 Old 10-10-2009, 02:14 PM Thread Starter
Registered User
1991 YJ Wrangler 
Join Date: Oct 2009
Location: maui
Posts: 4
Looks like fuel pump is broken --- true?

Hello --- ive been struggling getting my jeep started after an unanticipated year away. it was sitting in mud for the year unfortunately. Looking back, i should have drained my old fuel -- i may have avoided all this trouble.

Upon return, Car started easily and ran great for one month. Then it started running rough a little bit, then it died on the way to work. I towed it home and managed to get it going again with fuel injector cleaner put directly into the engine via the air intake port.

Next day, was letting it run in the driveway for a little, when it died completely... no chance of starting. Checked the fuse box: ok. Checked the fuel pressure/ purge valve on the rail and all that was coming out was air. But -- it was air under pressure: every time i tried to turn it over it build more air up in the fuel system.

My neighbors seem to think its the fuel pump.

- what about the fuel filter?? kinda seems super clogged to me. if i were to change the filter to start, how do i test it without putting the tank back on... just in case it is the pump too??

- how can i tell if my tank is rusty inside? if it is, how do i fix it? new tank?

- could i have avoided all this if i had changed out the old gas upon returning? There was a half tank in there, then when i returned i put in 20 bucks more.... when it broke it was back to half a tank.

any help would be appreciated.... thank you!

cfixy is offline  
Sponsored Links
post #2 of 5 Old 10-10-2009, 02:17 PM
Got my eye on you.....
rustywrangler's Avatar
Join Date: Apr 2005
Location: Syracuse, NY
Posts: 18,613
First off, change the filter. It is on the frame rail just in front of the tank. Second, check all of your lines.

If non of this works, are you certain you have enough gas in there?? the gauges are notorious for being totally off. If you are priming air, then you have something wrong with the pump setup, pickup. This should be checked after you change the filter.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Congenital Heart Disease is a reality for me, BOTH of my children have it. Please read up and become aware for future generations

Lydia Ann-Acquired 08/05/05 Open Heart surgery 08/10/05
Jacob Patrick-Acquired 01/17/08 Open Heart surgery 02/15/08
rustywrangler is offline  
post #3 of 5 Old 10-10-2009, 02:41 PM Thread Starter
Registered User
1991 YJ Wrangler 
Join Date: Oct 2009
Location: maui
Posts: 4
hm. interesting.

my dash lights quit working last week too --- maybe my gas gauge went with it? my battery gauge works fine -- i watched the needle wobble while we were replacing the battery a few days ago (another dont-let-your-car-sit project).

besides using the gas gauge, how else can i tell if there is gas inside? sure seems like it could be an empty tank, now that you bring it up. but, im pretty sure there is gas in there, based on memory.

how do i "check all my fuel lines"?? what am i looking for? where are "all" of them?

so my fuel filter isnt in the tank??? great!! ill go replace that immediately.... crossing my fingers....
cfixy is offline  
post #4 of 5 Old 10-10-2009, 02:51 PM Thread Starter
Registered User
1991 YJ Wrangler 
Join Date: Oct 2009
Location: maui
Posts: 4
sorry --- forgot to ask this too..... this jeep has always had ridiculously low mpg. would a clogged filter/weak pump have anything to do with my fuel efficiency?? its at 11mpg at the moment, id love to get it back up to where its supposed to be.... what, at 15 or so? the car seems to run strong, when its running anyway....

thanks again.
cfixy is offline  
post #5 of 5 Old 10-10-2009, 11:36 PM
Registered User
Join Date: Mar 2006
Posts: 1,974
change the filter first, and make sure its no minor issues causing it to just run poorly. but pumps sitting submerged in gas for periods of time can kill them. im away from my YJ for months at a time, and have had pump problems in the past.

dropping the tank a 1 hr deal, and you can "jump" the pump after you remove it with 2 wires, and a battery. just make sure the pump is dry first. if its shorting, or going bad you can usually tell pretty easily

[CENTER]1995 fire red XJ, new 4.0, ARB safari snorkel, sye, front DS, aussie locked 8.8 5:13s 38 SXs, trussed/locked 44 front, hydro assist, DOM steering/COLOR]
YJ. 91 body, body off resto, crate chevy 350, 700r tranny, 2 inch springs, SOA, ford 9 rear, dana 44 front, both detroits, cage, 4:88s, and 36X14.50s. strictly street queen
iwishihad1 is offline  

Quick Reply

Register Now

In order to be able to post messages on the JeepForum.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.

Email Address:


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page

Similar Threads
Thread Thread Starter Jeep Forums Replies Last Post
Broken Fuel Rail and Fuel Lines!!!! narnold YJ Wrangler Technical Forum 12 08-28-2013 10:34 AM
Replace Fuel Pump or Fuel Pump/Sending Unit assembly? Muratus TJ Wrangler Technical Forum 10 02-09-2012 10:08 AM
Replaced fuel pump/filter in 2001 TJ....broken plastic hose connector pbllr450 TJ Wrangler Technical Forum 2 02-15-2011 11:31 PM
Broken high pressure gas line connector on fuel pump taftech TJ Wrangler Technical Forum 12 01-02-2010 10:24 AM
Fuel pump assembly vs. fuel pump? eclipse27 TJ Wrangler Technical Forum 11 11-11-2008 10:18 AM

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 Off
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome