what is 93 yj 2.5 fuel pressure be - JeepForum.com

 
LinkBack Thread Tools
post #1 of 3 Old 08-29-2013, 07:51 PM Thread Starter
grayt37
Registered User
1993 YJ Wrangler 
 
Join Date: Aug 2013
Location: acworth
Posts: 4
what is 93 yj 2.5 fuel pressure be

my jeep is running a little rough and I had a code of 24 so I replaced the tps today .I can hear my fuel pump humming...so I checked the pressure and when I turn the key right before it starts the pressure is only around 4 psi and at idle its 30psi..when I drove around auto zones parking lot at a slow speed the pressure stayed at 30 psi ..is this normal?

grayt37 is offline  
Sponsored Links
Advertisement
 
post #2 of 3 Old 08-29-2013, 07:57 PM
laybackman
Bikini Bridge Inspector
 
laybackman's Avatar
2010 JK Wrangler 
 
Join Date: Dec 2002
Location: Massachusetts
Posts: 6,889
Quote:
Originally Posted by grayt37 View Post
my jeep is running a little rough and I had a code of 24 so I replaced the tps today .I can hear my fuel pump humming...so I checked the pressure and when I turn the key right before it starts the pressure is only around 4 psi and at idle its 30psi..when I drove around auto zones parking lot at a slow speed the pressure stayed at 30 psi ..is this normal?
Yes.

Do you know what was good about the good old days? I wasn't good, And I wasn't old!

Senators and Congressman should wear uniforms like NASCAR drivers so we could identify their corporate sponsors....
laybackman is offline  
post #3 of 3 Old 09-01-2013, 08:05 AM
Que89YJ
Web Wheeler
1989 YJ Wrangler 
 
Join Date: Apr 2008
Location: Detroit
Posts: 21,401
That start pressure is low. The fuel pressure should be 31psi at idle, 39 when disconnecting the vacuum line to the fuel pressure regulator and it should maintain 20 psi for longer then 20 minutes when you shut it off. If you are onle seeing 4 psi before you start you need to check the bleed down pressure and if it is bad replace the fuel pump. The check valve in the pump is bad.
Que89YJ is online now  
Reply

Tags
fuel , fuel pressure , fuel pump

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