no power to fuel pump - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > YJ Jeep Wrangler Forum > YJ Tech Forum

Join Wrangler Forum Today


Reply
 
Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 08-12-2009, 09:26 PM   #1
Jeeper
 
minderbinder3's Avatar
 
Join Date: Apr 2007
Location: East Texas
Posts: 273
no power to fuel pump

My 1991 YJ 2.5 suddenly died yesterday. It has spark, but no fuel pressure and the fuel pump doesn't come on at all. I checked the voltage to the fuel pump it doesn't have any. I checked another similar Jeep it had 7+ volts going to the fuel pump. I checked and changed all the relays and still nothing. It has power going into the power box (where the relays are) and I cleaned all the terminals and grounds I could find on the firewall just above the power box and battery. Any suggestions?

__________________
Respect is earned and Honor is given
2005 LJ 6-speed with 3" Zone & 33" BFG A/T's
minderbinder3 is offline   Quote Quick Reply
Old 08-12-2009, 09:49 PM   #2
Jeeper
 
Join Date: Apr 2008
Posts: 15
the same thing happened to me a few years back, it turned out to be a bad ground wire. i ended up cutting it and running a new ground. good luck

Captaincoop1220 is offline   Quote Quick Reply
Old 08-12-2009, 10:17 PM   #3
Jeeper
 
minderbinder3's Avatar
 
Join Date: Apr 2007
Location: East Texas
Posts: 273
You talking about 1 of the three wires that run to the connector for the fuel pump or is there another ground somewhere?
__________________
Respect is earned and Honor is given
2005 LJ 6-speed with 3" Zone & 33" BFG A/T's
minderbinder3 is offline   Quote Quick Reply
Old 08-12-2009, 10:33 PM   #4
Jeeper
 
Join Date: Aug 2009
Location: Huntingtown maryland
Posts: 162
try fuses or reley
wbrett1027 is offline   Quote Quick Reply
Old 08-12-2009, 10:35 PM   #5
Jeeper
 
skeeter's Avatar
 
Join Date: Dec 2006
Location: Spokane, Wa.
Posts: 3,869
Send a message via Yahoo to skeeter
You'll only have power to the fuel pump for a second or so when you hit the key.
Have someone else turn the key while you watch the tester.
Also, make sure you're testing the right wire, it's really frustrating to spend a bunch of time looking for an electrical problem only to find out you were testing the gauge wire
__________________
"But it does me no injury for my neighbour to say there are twenty gods, or no god. It neither picks my pocket nor breaks my leg." - Thomas Jefferson, Notes on the State of Virginia, 1782

Arguing with a truck driver is like wrestling with a pig in mud, eventually you realize the pig enjoys it.
skeeter is offline   Quote Quick Reply
Old 08-13-2009, 07:04 AM   #6
Jeeper
 
minderbinder3's Avatar
 
Join Date: Apr 2007
Location: East Texas
Posts: 273
You were right. Once I test the connector while someone turns the key...I get a flash of power similar to the other Jeep's. I have checked all fuses and relays and they seem fine. The reason I am wondering if it really is the fuel pump or not is because it did not give any warning when it stalled. It did not act like it was fighting for fuel or anything, but either way there is no fuel at the TB.
__________________
Respect is earned and Honor is given
2005 LJ 6-speed with 3" Zone & 33" BFG A/T's
minderbinder3 is offline   Quote Quick Reply
Old 08-13-2009, 08:57 AM   #7
Hacks off Parts while Lit
 
whitebuffalo's Avatar
 
Join Date: May 2005
Location: The Sandhills of South Texas
Posts: 2,290
i just went through this. jeep was running fine one minute and then died and wouldnt restart unless i gave it some ether. on mine, the prefilter/sock/strainer thing that is on the end of the fuel pump basically imploded and went into the fuel pump. the pump is around $140 iirc.
__________________
'90 YJ, ford 8.8, SOA, lincoln front, aussie rear, 4.88s, swampers.
whitebuffalo is offline   Quote Quick Reply
Old 08-13-2009, 11:22 AM   #8
Jeeper
 
skeeter's Avatar
 
Join Date: Dec 2006
Location: Spokane, Wa.
Posts: 3,869
Send a message via Yahoo to skeeter
__________________
"But it does me no injury for my neighbour to say there are twenty gods, or no god. It neither picks my pocket nor breaks my leg." - Thomas Jefferson, Notes on the State of Virginia, 1782

Arguing with a truck driver is like wrestling with a pig in mud, eventually you realize the pig enjoys it.
skeeter is offline   Quote Quick Reply
Old 08-13-2009, 02:34 PM   #9
Jeeper
 
minderbinder3's Avatar
 
Join Date: Apr 2007
Location: East Texas
Posts: 273
Autozone has each (screw on and snap on) of the fuel pumps in stock for under $90, so I'm going to pull it and then see which one I need. I am also going to replace my filler tube while I'm there because mine has some cracking. I had to order it from the dealership but it was only $20. Thanks for your help and I will post my results.
__________________
Respect is earned and Honor is given
2005 LJ 6-speed with 3" Zone & 33" BFG A/T's
minderbinder3 is offline   Quote Quick Reply
Old 08-14-2009, 09:54 PM   #10
Jeeper
 
minderbinder3's Avatar
 
Join Date: Apr 2007
Location: East Texas
Posts: 273
All's good. I replaced the fuel pump today and she fired right up. It wasn't too bad I bought the pump from Autozone for $81.99, as well as a new strainer for $11.99. I could not see anything visibly wrong with the other one but something apparantly went bad. Getting the tank down and out and then in and up was a bit of a struggle, but after I cut the rusty bolts off the skid plate it only took me a couple of hours. My tank is poly and surprizingly clean on the inside and I cleaned up the connectors on the sending unit while I was there. She idles better now...however my fuel gauge no longer works. Any ideas? By the way...thanks for all your help on this one. It feels good to have her back on the road.

__________________
Respect is earned and Honor is given
2005 LJ 6-speed with 3" Zone & 33" BFG A/T's
minderbinder3 is offline   Quote Quick Reply
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Jeep Wrangler Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
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:

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

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 Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
95 YJ Fuel Pump, no power at connector? snb73 YJ Tech Forum 6 06-06-2013 03:02 PM
92 YJ 2.5 Won't start, no power to the fuel pump eyeChrs YJ Tech Forum 15 02-14-2012 04:46 PM
No power to fuel pump SoMD 87 Jeep YJ Tech Forum 1 05-22-2009 08:37 AM
1990 Wrangler - fuel pump & sending unit 93Gr YJ Tech Forum 15 05-11-2009 08:47 AM
intermittant power to fuel pump skeeter General Jeep Discussion 4 02-08-2009 08:22 PM



» Featured Product

All times are GMT -5. The time now is 04:06 PM.



Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, and Grand Cherokee are copyrighted and trademarked to Chrysler Motors LLC.
Wranglerforum.com is not in any way associated with the Chrysler Motors LLC