Fuel pump?? - JeepForum.com
 
LinkBack Thread Tools
post #1 of 5 Old 12-17-2012, 08:51 AM Thread Starter
Nate_nev
Registered User
1997 XJ Cherokee 
 
Join Date: Jun 2012
Location: Sault Ste. Marie
Posts: 42
Fuel pump??

I've had for the past month had problems with starting after driving. the problem was intermittent but now the xj wont start... yay... Just got back to town from work, drove to the mall (4 Miles) and after an hour sitting it would roll over but not start.

I tried:

plane old start ie, turn key wait 3 seconds and turn all the way to start.

turn over with gas pedal to the floor.

then after I got fed up, I sprayed some quick start to the intake and it started but immediately stalled out.

Tonight I am going to check to see if I have any fuel pressure, but I did not hear the pump turn on. I also swapped relays and checked the fuses with no happy start afterwards.

I am wondering if this pump has a common problem with power wires breaking after time and easy to fix/replace wire? or should I just go straight to replacing the fuel pump?

thanks for the input!!

Nate_nev is offline  
Sponsored Links
Advertisement
 
post #2 of 5 Old 12-17-2012, 09:41 AM
BigByrd47119
Registered User
1998 XJ Cherokee 
 
Join Date: Oct 2012
Location: Detroit
Posts: 153
You should be able to hear the pump kick on. If not you know its something pump related, especially since starter fluid got it to run for a second.

Its always possible that wires have gone bad, but Id say the pump is far more likely to fail. You can always drop the tank and check the wiring to make sure the pump is getting juice but Id guess and say its the pump, not the wiring.
BigByrd47119 is offline  
post #3 of 5 Old 12-17-2012, 10:04 AM
tjwalker
It's the crank sensor!
 
tjwalker's Avatar
1999 XJ Cherokee 
 
Join Date: Nov 2007
Location: Central Minnesota
Posts: 8,745
By design, when the key is turned to the ON position, the fuel pump should run for approximately 2 seconds.

If you do NOT hear the pump energize and run when you do that, you either have a problem with control electronics or the fuel pump itself.

For starters, I would go under the hood to the power distribution center (black box on the passenger side) and swap the fuel pump relay with another relay just to be sure the problem isn't relay related. These relays are all of the same part number, so swapping them is not an issue.

99 Cherokee, 4.0 AW4, NP242
Past Jeeps: 49 Willys, 81 Scrambler, 88 Comanche
Without "data", all you have is an opinion!
tjwalker is offline  
post #4 of 5 Old 12-17-2012, 04:22 PM
OnTheFence
Registered User
 
Join Date: Oct 2012
Location: USA
Posts: 430
OnTheFence is offline  
post #5 of 5 Old 12-17-2012, 04:34 PM
bigbill888
Registered User
1996 ZJ 
 
Join Date: Nov 2009
Location: michigan
Posts: 969
Hope you didn't fill 'er up today

96 ZJ Laredo, 4.0, 242, 230K
95 ZJ Limited, 4.0, 242, 140K
98 XJ Sport, 4.0, 231, 140K
All work well
bigbill888 is offline  
Reply

Tags
fuel , fuel pump , fuel pump assembly

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.



Email Address:
OR

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.




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



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