Fuel Pressure Regulator - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > TJ Jeep Wrangler Forum > TJ General Discussion Forum

Join Wrangler Forum Today


Reply
 
Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 08-02-2011, 04:00 PM   #1
Jeeper
 
empirepball's Avatar
 
Join Date: Jan 2010
Location: westminster, MD
Posts: 27
Fuel Pressure Regulator

I went to my local dealership to day to get a fuel pressure regulator for my 97 4.0, and the guy said that I would have to buy a whole new fuel pump for $505 which I thought was ridiculous. Where can I get it or do i actually have to buy a new pump cuz i would rather deal with the long crank time till I ship out to Parris Island than have to spend $500.

empirepball is offline   Quote Quick Reply
Old 08-02-2011, 04:11 PM   #2
Jeeper
 
Abnmarine's Avatar
 
Join Date: Mar 2011
Location: Honolulu, HI
Posts: 421
Taken from an earlier post by Jerry:

Quote:
Originally Posted by Jerry Bransford View Post
The check valve is located inside the fuel pressure regulator, which sits on top of the fuel tank. You can buy a new fuel pressure regulator for around $80 from RockAuto Auto Parts which will fix the problem which is way too common on TJs.

This is what the fuel pressure regulator looks like, I had to replace mine earlier this year for the same problem.

__________________
1998 Wrangler Sport: 4.0 with a 5 speed, 2 1/2" spring lift, 33" Duratracs, Warn winch, and few other things.
Abnmarine is offline   Quote Quick Reply
Old 08-02-2011, 04:58 PM   #3
Jeeper
 
my98tj's Avatar
 
Join Date: Aug 2005
Location: Tullahoma, TN
Posts: 585
or you could just turn the key on (letting the fuel pump cycle), turn the key off, then turn the key and start it.
__________________
Can anyone tell me how the flux capacitor is used to facilitate time travel?
my98tj is offline   Quote Quick Reply
Old 08-02-2011, 08:50 PM   #4
Knows a couple things...

WF Supporting Member
 
Jerry Bransford's Avatar
 
Join Date: Nov 2005
Location: Escondido, Calif.
Posts: 33,252
Images: 2
Quote:
Originally Posted by Abnmarine View Post
Taken from an earlier post by Jerry:
Yep they call it a "fuel injection pressure regulator" and they have three different models to choose from at RockAuto Auto Parts priced from $66 to $93 for the '97 TJ. I bought the mid-priced model which is working fine.
__________________
When you have a choice, buy American.

Jerry Bransford is offline   Quote Quick Reply
Old 08-21-2011, 08:34 PM   #5
Jeeper
 
Stanton Tucker's Avatar
 
Join Date: Aug 2011
Location: Chache Valley Utah
Posts: 355
Images: 1
So did your jeep have this starting problem too before you bought a "fuel pressure regulator"? and if so when you replaced it did it start up just fine every time after that?
Stanton Tucker is offline   Quote Quick Reply
Old 08-21-2011, 08:42 PM   #6
Knows a couple things...

WF Supporting Member
 
Jerry Bransford's Avatar
 
Join Date: Nov 2005
Location: Escondido, Calif.
Posts: 33,252
Images: 2
Quote:
Originally Posted by Stanton Tucker View Post
So did your jeep have this starting problem too before you bought a "fuel pressure regulator"? and if so when you replaced it did it start up just fine every time after that?
Yes, it is for that reason the fuel pressure regulator gets replaced. And yes a new fuel pressure regulator fixes that problem permanently.
__________________
When you have a choice, buy American.

Jerry Bransford is offline   Quote Quick Reply
Old 08-22-2011, 08:07 PM   #7
Jeeper
 
empirepball's Avatar
 
Join Date: Jan 2010
Location: westminster, MD
Posts: 27
yes i had the starting problem before i replaced the fuel pressure regulator. But i just ended up replacing the whole fuel pump which had a a the regulator on cuz still had the factory pump in it. And i am glad i did cuz the sock at the bottom of the fuel pump which was like a filter was just floating around in the gas tank. And now my jeep starts up right away so it did fix my problem.
empirepball is offline   Quote Quick Reply
Old 08-22-2011, 08:52 PM   #8
Jeeper
 
tkagad's Avatar
 
Join Date: Aug 2011
Location: IL
Posts: 125
Quote:
Originally Posted by empirepball View Post
yes i had the starting problem before i replaced the fuel pressure regulator. But i just ended up replacing the whole fuel pump which had a a the regulator on cuz still had the factory pump in it. And i am glad i did cuz the sock at the bottom of the fuel pump which was like a filter was just floating around in the gas tank. And now my jeep starts up right away so it did fix my problem.
What starting problem did you have? Also, was your fuel guage off?
tkagad is offline   Quote Quick Reply
Old 08-22-2011, 09:08 PM   #9
Newb
 
Join Date: May 2011
Location: Mauldin SC
Posts: 10
Fuel pressure reg doesnt always fix this. There is a check valve in the bottom of th "cup" that the pump sits in. If it leaks down the pump will lose it's prime and take longer to start.
blever is offline   Quote Quick Reply
Old 08-22-2011, 09:10 PM   #10
Knows a couple things...

WF Supporting Member
 
Jerry Bransford's Avatar
 
Join Date: Nov 2005
Location: Escondido, Calif.
Posts: 33,252
Images: 2
The fuel pressure regulator has the master check valve inside it. If it works, it doesn't matter if there is or is not a second check valve anywhere further down the line. Replacing the fuel pressure regulator with a good replacement will always fix the slow-start issue when it is caused by the fuel leaking back down out of the fuel rail and back into the gas tank.
__________________
When you have a choice, buy American.

Jerry Bransford is offline   Quote Quick Reply
Old 08-23-2011, 03:32 PM   #11
Newb
 
Join Date: May 2011
Location: Mauldin SC
Posts: 10
Jerry, normally I would agree with you, but my personal experiance says otherwise. I had the long crank time and replaced just the pump. I still had the problem so I replaced the filter/regulator with a new Mopar unit and the problem continued. I took the unit out again and disassembled the plate the pump sits on. It consists of 2 socks and a check valve. The check valve has a metal washer that sits on top of a rubber disk. When the pump runs it pulls the disk up and allows fuel into the pump. When off it prevents fuel from draining out of the pump. All I did with mine was replace both socks and flip the rubber disk over. It's been starting perfectly ever since.
blever is offline   Quote Quick Reply
Old 08-23-2011, 08:00 PM   #12
Knows a couple things...

WF Supporting Member
 
Jerry Bransford's Avatar
 
Join Date: Nov 2005
Location: Escondido, Calif.
Posts: 33,252
Images: 2
That the first fuel pressure regulator you installed did not fix it simply means it was defective, a not uncommon thing. My first replacement fuel pressure regulator was defective too which threw me for a loop.

Out of frustration, I later removed it and tested it (blew backwards through it) and found it had been defective all along. A second replacement fuel pressure regulator fixed the problem. And at under $80 a new fuel pressure regulator is also a lot less expensive to buy than a new fuel pump.
__________________
When you have a choice, buy American.

Jerry Bransford is offline   Quote Quick Reply
Old 08-24-2011, 04:52 PM   #13
Newb
 
Join Date: May 2011
Location: Mauldin SC
Posts: 10
All I can say is ever since I flipped the rubber disk over in the bottom of the pump my Jeep starts perfectly. I just think that people should know there is more than 1 check valve and the either one can cause a problem. Mine certainly did.

blever is offline   Quote Quick Reply
Reply

Tags
fuel pressure regulator , fuel pump , long cranking time

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:
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
Trouble shooting- no spark, no fuel pressure. Curro TJ General Discussion Forum 3 05-30-2011 07:45 AM
TJ died with no warning and no codes??? Keiger TJ Tech Forum 27 01-11-2011 10:04 PM
4.2 weber carb fuel pressure? yjtoddb YJ Tech Forum 0 11-16-2010 07:38 PM
Slow to build fuel pressure pumba General Jeep Discussion 0 08-04-2010 11:26 PM
Low fuel pressure with new fuel pump & filter crbnfbr YJ Tech Forum 0 11-08-2009 07:33 PM



Download our Mobile App

» Network Links
»Jeep Parts
» Featured Product

All times are GMT -5. The time now is 04:16 AM.



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