NAXJA Forums -::- North American XJ Association  

Go Back   NAXJA Forums -::- North American XJ Association > NAXJA Unibody Jeep Technical Forums > Jeep Cherokee XJ (1984 - 2001) > OEM Tech Discussion
HOME Member FAQ Sponsor Info Rules Bylaws E-Mail

OEM Tech Discussion Forum for OEM (Original Equipment) or stock XJs and MJs.

 
 
Thread Tools Display Modes
Prev Previous Post   Next Post Next
  #1  
Old July 29th, 2020, 18:54
xjerod's Avatar
xjerod xjerod is offline
NAXJA Forum User
 
Join Date: Jul 2020
Location: maryland
Posts: 19
Fuel Pump Noise

I have a 91 XJ and i just installed a new Delphi fuel pump, now I am getting a humming/vibration noise from the pump. The odd thing is that if I disconnect the vacuum line to the Fuel Pressure Regulator (FPR) the noise stops. I am not sure if the issue is the fuel pump or the possibly the fuel filter. I also recently replaced the FPR but I put the old one back on and the fuel pump makes the same noise when the vacuum line is connected to either pump. The noise is constant while the Jeep is on. I am getting about 35PSI with the vacuum line connected and about 42 with it disconnected.

I have seen many people with similar issues but I do not want to buy another fuel pump and instal if it is going to do the same thing.

91 XJ
4.0
Automatic
Reply With Quote
 


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not 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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Fuel Pump Noise clydefrog Modified Tech Discussion 3 August 17th, 2017 20:54
Odd Noise after fuel pump swap MissouriXJ OEM Tech Discussion 16 November 22nd, 2009 12:16
fuel pump noise? buster cherry OEM Tech Discussion 3 January 18th, 2009 01:00
Fuel Pump Noise Zoro OEM Tech Discussion 12 May 5th, 2008 17:38
fuel pump noise herreraxto OEM Tech Discussion 10 June 14th, 2004 12:36


All times are GMT -7. The time now is 02:06.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2021, vBulletin Solutions, Inc.
NAXJA and NAXJA logo's Copyright NAXJA. All content/images Copyright NAXJA 1999-2014