XJS ( X27 ) 1975 - 1996 3.6 4.0 5.3 6.0

Steering is lumpy

 
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Old 06-12-2019, 05:07 PM
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Default Steering is lumpy

Hi all - my XJS v12 93 vintage has developed a strange issue with the steering - it's lumpy. Feels like the assistance is coming in then off then in, then off.

Has new tyres correctly inflated, new front springs, greased UJs, and nothing obvious from the MOT. The rack hoses were replaced a few years ago.

Any thoughts??

Thanks in advance!

P.
 
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Old 06-12-2019, 06:34 PM
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Hi Pedman

Don't want to state the obvious but have you checked the level of the Power Steering Fluid?
 
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Old 06-12-2019, 10:21 PM
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Loose drive belt at the pump?


Cheers
DD
 
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Old 06-13-2019, 12:19 AM
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Good timing this post, I felt my steering wheel... pulsing when manoeuvring the car in the driveway, nothing when driving.
Fluid is good, does not seem to be a leak BUT I have put new belts on and have not checked them since they were installed, so thanks I will check the belt.
 
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Old 06-13-2019, 12:22 AM
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Originally Posted by Dukejag View Post
BUT I have put new belts on and have not checked them since they were installed, so thanks I will check the belt.
Good idea. It's fairly common for new belts to stretch a wee bit, and need re-tensioning.

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DD
 
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Old 06-13-2019, 02:52 AM
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Thanks all, fluid seems fine, belt seems tight. Maybe the steering pump on the way out?
 
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Old 06-13-2019, 03:23 AM
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Actually maybe the rack mounts? They might be the original ones
 
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Old 06-17-2019, 05:08 AM
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Hi Orangeblossom, nothing wrong with asking the obious - they are usually the easiest things to miss! Fluid is fine, belt seems fine as well, but thanks!
 
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Old Today, 06:38 AM
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Originally Posted by pedman View Post
Actually maybe the rack mounts? They might be the original ones
Sloppy rack mounts let the road steer the wheels. Quite scary when they are all failed, but when they’re on the way out the steering just feels vague and unresponsive with occasional unexpected darting. Possibly interpreted as assist coming in and going out. What’s the “lumpiness” feel like? Is it only at speed?
 
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Old Today, 08:56 AM
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Hi JigJag - thanks for the reply. It seems to happen even when standing still, so at least it doesn't sound like the mounts - which is a relief.
 
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Old Today, 09:11 AM
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Sounds like you take care of your car. One thing that comes to mind for me in your story is the seals in the rack itself? Maybe. If you can (and I'm sure your boots are new), do youse any fluid leaking at or around where the steering rod ends meet the rack? Maybe fluid gets past seals in some area but not escaping the system?

My next thought was the pump itself. Just changed mine. Not so bad as LONG as you simply remove any and everything that's in your way in getting to it... Saves hand skin and your neighbors hearing you curse and swear ---- the XJS invoked human spectacle, ya know,,, lol?
 
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Old Today, 09:19 AM
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I have a large collection of spanners that have been cut in half to get clearance :-) - along with a large collection of scratches, scrapes, missing skin, etc from fighting around that V12!!
Boots look okay, and there doesn't seem to be fluid inside them - I'm beginning to suspect the pump myself.
 
 
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