Fuel pressure.. problem? - JeepForum.com

 
LinkBack Thread Tools
post #1 of 4 Old 09-03-2002, 01:21 PM Thread Starter
martyb
Registered User
 
Join Date: Aug 2002
Location: Baltimore, Maryland
Posts: 27
Fuel pressure.. problem?

I've got an 84 CJ7 with the 258. I've also got the Mopar MPI kit. Everything was running great. All of a sudden, it feels like it's running out of gas going around corners in 3rd or 4th.. and even 2nd if I'm going slow enough. It starts jerking around. It will even stall on occasion.

All of this happens when going around corners. It will do the same thing, if I'm in too high of a gear. I checked the fuel pressure and it's at a steady ~28. I think it's supposed to be around 32 and shoot up to 40 with the vacuum disconnected. But it only goes up to ~38 with the vacuum hose off.

There's also a split second hesitation when you step on the gas from a standstill.

I think it's my fuel pump. The thing is making some weird buzzing noise. When I first put it on, it had a little whine to it, but no buzz.

Would that little (big?) difference in fuel pressure be the problem? My dad says that the pressure seems alright, like it shouldn't have that much of an affect.

I don't know.. anyone have any advice? Thanks

martyb is offline  
Sponsored Links
Advertisement
 
post #2 of 4 Old 09-21-2002, 09:01 AM
lostboy
Registered User
 
Join Date: May 2001
Location: NY
Posts: 533
I have the same kit in mine...that pressure is exactly what I have. If your pump is making noise,it may be working too hard.Is the pickup in the tank ok? It sounds like the pump is starving for fuel.

89 yj w/ mopar mpi and 4.0 head.94 ax-15 tranny and t-case, more mods comin.
lostboy is offline  
post #3 of 4 Old 09-23-2002, 06:40 PM
KnightFire
Registered User
 
KnightFire's Avatar
2002 TJ Wrangler 
 
Join Date: Jul 2002
Location: Charles Town, WV
Posts: 800
Definately take a look at your fuel pump!





KnightFire


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Patriot Blue 4.0L

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Cardinal Red 355CI

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Flame Red 5.7L 4x4

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Titanium Metallic 4.7L 4x4
KnightFire is offline  
post #4 of 4 Old 02-25-2003, 05:19 PM
lostboy
Registered User
 
Join Date: May 2001
Location: NY
Posts: 533
Saw another thread in the YJ forum about a clogged return line.This could cause a drop in pressure and/or cause the pump to work too hard.

89 yj w/ mopar mpi and 4.0 head.94 ax-15 tranny and t-case, more mods comin.
lostboy is offline  
Reply

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



Similar Threads
Thread Thread Starter Jeep Forums Replies Last Post
Help finding a fuel pressure regulator Shorty Engines & Drivetrain 2 07-09-2007 03:03 PM
Fuel pressure problem TSEJEEPERS Engines & Drivetrain 0 11-25-2006 02:34 PM
4.0 fuel pressure question 4 wheel high Engines & Drivetrain 1 05-01-2005 09:19 PM
Fuel Filter Pressure? TEXASRAM Engines & Drivetrain 2 09-03-2004 06:58 AM
Jeep fuel pressure regulator bigThart Engines & Drivetrain 4 01-29-2003 11:22 PM

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