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.

Reply
 
Thread Tools Display Modes
  #1  
Old October 7th, 2018, 09:35
Hypoid's Avatar
Hypoid Hypoid is online now
NAXJA Member
 
Join Date: Jul 2006
Location: Golden, CO
Posts: 7,290
Power Steering oddity

1990 XJ, 4.0, AW4.

About a year ago, I replaced the power steering pump with a remanufactured unit I found in the junkyard. I also replaced the return hose and added a filter in-line. At that time I filled with Valvoline power steering fluid and replaced the steering intermediate shaft. Later, I replaced the column. The high pressure line was replaced in 2015.

The unit has performed quietly and flawlessly until mid August. At the time I was at six weeks of 20 mile, mostly highway commute. The engine typically cruises at 2500 RPMs, with occasional 4000 RPM blasts to pull a hill or pass traffic.

The problem, the power randomly cuts out. I first noticed while getting off the highway, the steering wheel is hard to turn. Lightly jerking the wheel back and forth confirms the tires do respond to minimal input. Then, the power returns. It can cut out in the start of a turn, then as I crank on the wheel (hard), it comes back halfway through the turn. That part makes the problem a little spooky. The past few weeks, the problem has manifested itself at lower RPMs, and the pump does whine a little.

I have checked the fluid level, no leaks, no foam or other signs of cavitation. The fluid is still clear.

I am guessing the pump has a bypass that is sticking open. I plan to replace the filter, which will drain some of the fluid.

Should I be looking for a different type of fluid to refill the system?

What other things can cause this problem?

TIA
__________________
The Lost Boys' motto: We don't know where we are going, but we'll be there for awhile...
Reply With Quote
  #2  
Old October 7th, 2018, 20:13
Runnin'OnEmpty's Avatar
Runnin'OnEmpty Runnin'OnEmpty is offline
NAXJA Forum User
 
Join Date: Apr 2003
Location: Southeast USA
Posts: 1,053
Re: Power Steering oddity

I'm guessing here, but there's probably a spool valve in the steering box that's sticking. As you said, next step would be to replace the filter (or temporarily remove it as a test), and try an additive to see if it would free things up...
Reply With Quote
  #3  
Old October 8th, 2018, 01:39
tech1001 tech1001 is offline
NAXJA Forum User
 
Join Date: Oct 2016
Location: Los Angeles
Posts: 70
Re: Power Steering oddity

This may sound dumb but check your belt it may be a little loose
Reply With Quote
  #4  
Old October 8th, 2018, 15:44
md21722 md21722 is offline
NAXJA Forum User
 
Join Date: Feb 2014
Location: Colorado Springs
Posts: 2,332
Re: Power Steering oddity

If axle u-joints are worn out they can cause the steering to bind.

On my 97 XJ the power steering pump would go limp pulling in and out of parking spaces. I never really had any problems on the road. That doesn't mean it's not possible.
Reply With Quote
  #5  
Old October 8th, 2018, 20:54
trippled trippled is offline
NAXJA Member
 
Join Date: Apr 2006
Location: colorado springs, co
Posts: 1,991
Re: Power Steering oddity

If I had to guess I'd say I'd say the box is on it's way out or bad u joints. But kinda hard to say. Power steering pressure gauge would be only way to really know for sure. You can jack the front up, turn the wheels to lock and spin the tires by hand to check for a siezed u joint real quick. If it gets hard to turn or locks up you'll know it.

I've been using the Valvoline power steering fluid for a long time. Still rocking the original pump.
Reply With Quote
  #6  
Old October 11th, 2018, 04:15
Hypoid's Avatar
Hypoid Hypoid is online now
NAXJA Member
 
Join Date: Jul 2006
Location: Golden, CO
Posts: 7,290
Re: Power Steering oddity

Thanks for the responses!

The Jeep has been parked at work since the end of September. When I get it home again, I'll check the belt.
__________________
The Lost Boys' motto: We don't know where we are going, but we'll be there for awhile...
Reply With Quote
  #7  
Old October 11th, 2018, 09:43
alexgalexg's Avatar
alexgalexg alexgalexg is offline
NAXJA Forum User
 
Join Date: Jan 2013
Location: Connecticut
Posts: 524
Power Steering oddity

Most power steering fluid these days comes with stop leak. Maybe that's what the previous owner ran in that pump? Reman from junkyard usually means they just paint it. They dont rebuild it. May be gummed up

Sent from my SM-G950U using Tapatalk
Reply With Quote
Reply


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
Ignition Switch oddity Xtreme XJ OEM Tech Discussion 6 July 3rd, 2016 22:38
Oil Pressure oddity Jeff-97XJ OEM Tech Discussion 15 January 5th, 2013 09:09
Rear axle oddity??? heavyequipment OEM Tech Discussion 7 April 5th, 2011 12:40
Oddity - ghost brakes ?? TRCM OEM Tech Discussion 3 February 15th, 2011 16:41
Oddity 8Mud Political Discussion Zone 2 November 3rd, 2004 07:22


All times are GMT -7. The time now is 22:08.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
NAXJA and NAXJA logo's Copyright NAXJA. All content/images Copyright NAXJA 1999-2014