New fuel pump or what - 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 > TJ Wrangler Technical Forum > New fuel pump or what

Rockridge 4WD IS Taking Zone Offroad Suspension Lift Kits Rough Country Jeep Suspension Deals at Rockridge 4WD!Advance Adapters SYE Kits

Reply
Unread 07-24-2010, 10:09 AM   #1
turkeybuzzard
Registered User
1997 TJ Wrangler 
 
Join Date: Nov 2008
Location: MS
Posts: 94
New fuel pump or what

My fuel pump looses its prime after sitting a few hours. I have no pressure at the fuel rail. Will I have to replace the pump or is there a valve that can be replaced instead? I know I will have to drop the tank to fix the pump and I am dreading it. This is on my 97 tj. Is an after market pump ok?

turkeybuzzard is offline   Reply With Quote
Unread 07-24-2010, 11:06 AM   #2
TheBoogieman
Demonic Jeep Freak!
 
TheBoogieman's Avatar
1998 TJ Wrangler 
 
Join Date: Aug 2006
Location: Charlottesville, Va
Posts: 27,709
Quote:
Originally Posted by turkeybuzzard View Post
My fuel pump looses its prime after sitting a few hours.
Explain what you mean by that.Dropping the tank isn't that bad.
TheBoogieman is offline   Reply With Quote
Unread 07-24-2010, 11:33 AM   #3
turkeybuzzard
Registered User
1997 TJ Wrangler 
 
Join Date: Nov 2008
Location: MS
Posts: 94
Little or no pressure in the fuel rail. Hard starts.
turkeybuzzard is offline   Reply With Quote
Unread 07-24-2010, 11:36 AM   #4
TheBoogieman
Demonic Jeep Freak!
 
TheBoogieman's Avatar
1998 TJ Wrangler 
 
Join Date: Aug 2006
Location: Charlottesville, Va
Posts: 27,709
Have you tried the turn the key on for 30 seconds or so trick to see if it starts quicker?
TheBoogieman is offline   Reply With Quote
Unread 07-24-2010, 12:15 PM   #5
turkeybuzzard
Registered User
1997 TJ Wrangler 
 
Join Date: Nov 2008
Location: MS
Posts: 94
Yes if you turn the key four times and wait some it will crank faster. I just got my tank down and am looking at my pump.
turkeybuzzard is offline   Reply With Quote
Unread 07-24-2010, 12:18 PM   #6
GOLENJEEPTJ
Running Secretly Amok!
 
GOLENJEEPTJ's Avatar
2002 TJ Wrangler 
 
Join Date: May 2007
Location: Ventura ,CA., California
Posts: 9,672
I think he means starts quicker!Leaving the key of for a few seconds before trying to start allows fuel pressure to build up in the rail.
GOLENJEEPTJ is offline   Reply With Quote
Unread 07-24-2010, 12:55 PM   #7
turkeybuzzard
Registered User
1997 TJ Wrangler 
 
Join Date: Nov 2008
Location: MS
Posts: 94
When I turn key on I hear the pump humm, turn key off and turn key back on again hear the pump humm. If I do this 2 more times yes it will start quicker. Has been like this since I had it. If I just try and crank it you wind on it for then let off and then you wind on it some more and it will finally crank up.
turkeybuzzard is offline   Reply With Quote
Unread 07-24-2010, 12:56 PM   #8
Jonny Jeep
Web Wheeler
 
Jonny Jeep's Avatar
1997 TJ Wrangler 
 
Join Date: Feb 2007
Location: Manchester, UK
Posts: 4,564
You can replace the combined fuel filter/regulator on top of the tank, held in place with a metal clip. The regulator is supposed to hold pressure when the engine is not running. I replaced mine several years ago because of a long crank problem.

From $45 on ebay...


5210053 Pressure Regulator SMP # PR318 AIRTEX # 5G1211: eBay Motors (item 360271876015 end time Aug-11-10 12:05:57 PDT)

http://cgi.ebay.ca/JEEP-CHEROKEE-G-CHEROKEE-WRANGLER-FUEL-FILTER-REGULATOR-/370377727383
__________________
"Giving English to an American is like giving sex to a child. He knows it's important but he doesn't know what to do with it."
Adam Cooper (19th century)

Rockauto 5% discount code can be found here... http://www.markviii.org/LOD2/products_services.htm

Online factory service manuals (FSMs) and parts lists can be viewed at http://www.jeep4x4center.com/knowledge-base/index.htm
If the link doesn't work properly, look for the service manual link under Jeep Resources at the bottom of the page.
Jonny Jeep is offline   Reply With Quote
Unread 07-24-2010, 01:23 PM   #9
turkeybuzzard
Registered User
1997 TJ Wrangler 
 
Join Date: Nov 2008
Location: MS
Posts: 94
I don't have time to get the regulator, got it tore down now. Thanks. How can I tell what size tank I have? They make 1 for 15 gallon and 1 for 19?
turkeybuzzard is offline   Reply With Quote
Unread 07-24-2010, 01:24 PM   #10
cntryboy97
Registered User
1997 TJ Wrangler 
 
Join Date: Jun 2008
Location: NC
Posts: 91
how difficult is the regulator replacement (the one shown on the ebay link)? I also have the long crank problem and I wonder if I should replace the fuel pump & the regulator. Thanks
__________________
97 Wrangler Sport 4.0L.
3" BDS Lift, 4.11 gears, Tera Disco's, Rusty's Air tube, Rusty's adj. track bars, Class III Hitch, "Generic" Hi-Lift, 33 MT's on 8" black wheels, CB, etc. etc. etc
cntryboy97 is offline   Reply With Quote
Unread 07-24-2010, 01:32 PM   #11
Jerry Bransford
Do it right or not at all
 
Jerry Bransford's Avatar
2004 TJ Wrangler 
 
Join Date: Jan 2003
Location: Escondido, California, California
Posts: 60,043
The fuel pressure regulator is the usual cause of slow starts after the TJ has been sitting for a while. It has a check valve inside that is there to prevent the fuel from draining back down out of the fuel rail that the fuel injectors are seated into. When the check valve fails or starts leaking, it allows the fuel to drain down from the fuel rail and back into the tank instead of staying up top like it is supposed to for a fast engine start.
__________________
Getting Savvy...

Coolest offroad magazine ever! CRAWL Magazine

When you have a choice, buy American.

Jerry Bransford is offline   Reply With Quote
Unread 07-24-2010, 03:42 PM   #12
turkeybuzzard
Registered User
1997 TJ Wrangler 
 
Join Date: Nov 2008
Location: MS
Posts: 94
The tank was easy to drop, a lot easier than I thought. I had a jack and one helper. I am trying to find out what size tank I have in my jeep but am having no luck.
turkeybuzzard is offline   Reply With Quote
Unread 07-24-2010, 05:30 PM   #13
wushaw
Rockin jeep
 
wushaw's Avatar
2000 TJ Wrangler 
 
Join Date: Jan 2007
Location: Texas
Posts: 8,121
Quote:
Originally Posted by turkeybuzzard View Post
The tank was easy to drop, a lot easier than I thought. I had a jack and one helper. I am trying to find out what size tank I have in my jeep but am having no luck.
Hav you ever ran it out? What is the most fuel you have ever put in it?
wushaw is offline   Reply With Quote
Unread 07-24-2010, 05:39 PM   #14
turkeybuzzard
Registered User
1997 TJ Wrangler 
 
Join Date: Nov 2008
Location: MS
Posts: 94
Never did boy mostly drove it, I have it back and am trying to fix some things.
turkeybuzzard is offline   Reply With Quote
Unread 07-24-2010, 05:43 PM   #15
Jerry Bransford
Do it right or not at all
 
Jerry Bransford's Avatar
2004 TJ Wrangler 
 
Join Date: Jan 2003
Location: Escondido, California, California
Posts: 60,043
I'd bet it's the 19 gallon tank since you have the 4.0L. It's my impression that only the more stripped own models, especially like without a/c and with the 2.5L engine, came with the 15 gallon.
__________________
Getting Savvy...

Coolest offroad magazine ever! CRAWL Magazine

When you have a choice, buy American.

Jerry Bransford is offline   Reply With Quote
Reply

Tags
anti-drainback valve , fuel pressure regulator , check valve
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.