Fuel Pump? - JeepForum.com
Search  
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > Models > Jeep Wrangler Forums > YJ Wrangler Technical Forum > Fuel Pump?

Ruffstuff Axle Simple Swap Kit!ROCK BOTTOM prices on LIFT KITS at Rockridge4wd!! WANT TO Introducing MONSTALINER™ UV Permanent DIY Roll On Bed Line

Reply
Unread 01-21-2012, 03:59 PM   #1
ccm655
Registered User
1991 YJ Wrangler 
 
Join Date: Jan 2012
Location: annapolis, md
Posts: 2
Fuel Pump?

Hey guys. Question. I think I have a bad fuel pump, but thought I would try to verify before I dropped the tank.

91 YJ with 4 cyl. 150,000 miles. Has run great for years. In last month, battery died, replaced battery, wouldn't idle. Reset computer by disconnecting battery, seemed to fix it.

Drove for a couple days, and the thing started running really bad. It was a very sudden change. Limped it back home. Very rough idle, and when I hit the gas, it got worse. Eventually stalled and couldn't keep it running. Seemed like fuel issue. Disconnected the filter on the frame rail, cranked engine, and no gas shot out of the fuel line. Pump sounds like it is turning on, but not pumping.

Just looking for opinions before dropping the tank. Anything else besides pump that you guys think?

ccm655 is offline   Reply With Quote Quick reply to this message
Unread 01-21-2012, 04:18 PM   #2
jcmooreusmc
Registered User
1991 YJ Wrangler 
 
Join Date: Jul 2010
Location: Milledgeville, Georgia
Posts: 308
So you did check your fuel pressure release valve? Also, check your relays(simple stuff first) and make sure they are still good. Thought I had a bad fuel pump once, but turned out to be an $8 relay. Make sure all is good with your fuel filter as well. I have the same year model and engine as you do. I started with the inexpensive stuff and worked my way to the pump. It's generally older stuff that should be replaced anyway. Best of luck.
jcmooreusmc is online now   Reply With Quote Quick reply to this message
Unread 01-21-2012, 04:21 PM   #3
jcmooreusmc
Registered User
1991 YJ Wrangler 
 
Join Date: Jul 2010
Location: Milledgeville, Georgia
Posts: 308
Also, check the components of your throttle body (tps,iac) and make sure everything is tightened down properly. Mine had a rough idle, and something was loose on the tps or iac (don't remember which one), but once I cleaned and tightened it all back down, the problem was solved.
jcmooreusmc is online now   Reply With Quote Quick reply to this message
Unread 01-22-2012, 10:57 AM   #4
ccm655
Registered User
1991 YJ Wrangler 
 
Join Date: Jan 2012
Location: annapolis, md
Posts: 2
Thanks JC. I did move the relays around. Swapped the 3, starter, shutoff, and pump into different positions and same result. Again, I have the fuel line disconnected from the filter on the frame rail, and before the filter, no fuel comes out. Even cranking, no fuel comes out. I'm thinking pump, but appreciate your thoughts...always good to check the basic stuff first.
ccm655 is offline   Reply With Quote Quick reply to this message
Reply

Tags
fuel pump , rough idle , stalling , YJ

Quick Reply
Message:
Options

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:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.
Note: All free e-mails have been banned due to mis-use. (Yahoo, Gmail, Hotmail, etc.)
Don't have a non-free e-mail address? Click here for a solution: Manual Account Creation
Email Address:

Log-in

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.


Thread Tools


Suggested Threads





Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.