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Author Topic: Self-Levelling Rear End.  (Read 3072 times)

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P6UL K

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Self-Levelling Rear End.
« on: 06 March 2011, 19:24:01 »
Good evening!

Right, while laying under my rear end today i thought i would test my self-levelling suspension by popping off the little arm and guess what... Nothing!  ::)

Guess my next question lol

I've checked the fuse and its fine, so could the pump of had it?  As there's no pump noise coming from the front or are the shocks kaputski?  :D

Would advice would you suggest for further checks of the system to diagnose the what's wrong?
« Last Edit: 06 March 2011, 19:24:24 by P6UL_K »
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pirate

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Re: Self-Levelling Rear End.
« Reply #1 on: 06 March 2011, 19:27:25 »
looked under mine on the ramp and my shocks have been replaced with bilsteins so my self leverling dont do much too, dont know if i will leave or replace them ? not heard eny noises from pumps or enything can see the pipes which should go to them and the linkage to suspension. :(
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Varche

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Re: Self-Levelling Rear End.
« Reply #2 on: 06 March 2011, 20:07:41 »
Was it the correct sensor? I seem to remember there is another one on the rear too.? Ignition on?

Secondly did you move it and wait a bit?

The pump at the front under the wing is fairly easy to take off. Three bolts. I tested mine by just connecting across the battery terminals. It is easy enough then to see if it is working.
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feeutfo

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Re: Self-Levelling Rear End.
« Reply #3 on: 06 March 2011, 20:16:32 »
Check that...

There are 2 black relays above the fuses under the steering wheel(one is sl, one is high beam, so make sure there two)

The pump in the front drivers wing behind fog light is plugged in/getting power.

It was fuse 27 you checked for sl?

And for my own info can you see what rear springs you have with sl. Just want to prove plod run other than SL springs, which they must do. It will have AL or AW or similar printed on them.  :y

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P6UL K

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Re: Self-Levelling Rear End.
« Reply #4 on: 06 March 2011, 20:44:11 »
Quote
Check that...

There are 2 black relays above the fuses under the steering wheel(one is sl, one is high beam, so make sure there two)

The pump in the front drivers wing behind fog light is plugged in/getting power.

It was fuse 27 you checked for sl?

And for my own info can you see what rear springs you have with sl. Just want to prove plod run other than SL springs, which they must do. It will have AL or AW or similar printed on them.  :y


Hi Chris, leave it with me mate and i'll check all that tomorrow  :y
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P6UL K

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Re: Self-Levelling Rear End.
« Reply #5 on: 08 March 2011, 12:40:07 »
Chris, I'm just under the car now and the pump is plugged in and running when the ignition is turned on. There's the two little black relays and the 20amp fuse in No27 in the fuse box. Just checking the springs now.
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P6UL K

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Re: Self-Levelling Rear End.
« Reply #6 on: 08 March 2011, 13:13:50 »
I can't see anything written on the springs mate, I'm taking the rear wheels off tomorrow tho so I'll have a look then for you. Any further ideas on the suspension?
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amba

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Re: Self-Levelling Rear End.
« Reply #7 on: 08 March 2011, 13:14:09 »
From my own experience the simplest way to find out if the pump is working,and more importantly pushing air into the shocks is to remove one of the little black plastic elbows which connect the air pipe to the shock.

Turn ignition on and await pump under drivers side front wing to kick-in.When this happens,assuming it is working,you should then feel a constant gush of air coming out of the little pipe.

Assuming this is working on both sides you are then facing the probability that the shocks are not retaining the charge of air,and assuming you still require this function it will be necessary to replace them.

Access to the valve requires only just lifting the back end on a jack and for safety holding on a stand , and reaching under the top of the wheel and pulling the little metal clip undone and removing.
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feeutfo

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Re: Self-Levelling Rear End.
« Reply #8 on: 08 March 2011, 22:44:50 »
If pump is running thats all good.

As said if your getting air at the shock body joint, but still no elevation, then that would point to fubar shocks. Sounds like the pump may be running continuously if the shocks are leaking, so may want to pull the fuse to save wear until rectified.

Iirc sl shocks are £150 from Gm with a tc card. There are no alternatives that work with the on board sl system sadly. Although normal shocks could be fitted if the springs are firm enough.

Writing on springs may well depend on orientation when fitted, it could be anywhere around the circumferance. :y
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amba

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Re: Self-Levelling Rear End.
« Reply #9 on: 08 March 2011, 23:10:17 »
As said if pump is running,that ensures the electrical side is working.

Next you need to ensure air is being driven along the "plumbing" and getting to the shock absorbers on both sides.

If all that is correct then only remaining link in the chain is the air shocks themselves.You should be able to see a definite movement when the air is pumped into them,if not then they are knackered or atleast 1 of them is...you really should be able to hear the air escaping .

Until you can resolve the issue with the shock absorbers or atleast your decision on if to retain self levelling on the car,my advise would be to remove fuse #27 to avoid the pump working overtime and adding to the list of parts required.

Are you sure your car has self levelling shock absorbers fitted ?
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P6UL K

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Re: Self-Levelling Rear End.
« Reply #10 on: 10 March 2011, 12:47:15 »
Ok, cheers for your advice Chris/Amba.

The car 100% has the S/L rear shocks, won't be until tomorrow now that i'll be having a look underneath....
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Re: Self-Levelling Rear End.
« Reply #11 on: 10 March 2011, 13:16:49 »
Unless you do a lot of towing or have extremely fat and heavy kids I wouldn't bother with air shocks in my opinion.

I've just had standard ones fitted to my Elite and the cars never handled so well.

Air shocks are NOT worth the expence under normal circumstances it would appear.
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Andy B

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Re: Self-Levelling Rear End.
« Reply #12 on: 10 March 2011, 13:37:11 »
Quote
Unless you do a lot of towing or have extremely fat and heavy kids I wouldn't bother with air shocks in my opinion.

I've just had standard ones fitted to my Elite and the cars never handled so well.

Air shocks are NOT worth the expence under normal circumstances it would appear.

What about on a Lotus Carlton/Omega? They were fitted with almost exactly the same system, but that was so the stance of the car remained at its optimim so the spoilers worked.

I like my self levelers  ;) ;) :y
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P6UL K

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Re: Self-Levelling Rear End.
« Reply #13 on: 10 March 2011, 14:38:19 »
Quote
Unless you do a lot of towing or have extremely fat and heavy kids I wouldn't bother with air shocks in my opinion.

I've just had standard ones fitted to my Elite and the cars never handled so well.

Air shocks are NOT worth the expence under normal circumstances it would appear.

Eventually I'd like to lower it a smidge with some uprated Eibach springs and some Billies but for now i need the rear end working as I'm towing a car to Sweden in July for a car mag.

All that extra weight it'll need to stay upright!
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henryd

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Re: Self-Levelling Rear End.
« Reply #14 on: 10 March 2011, 15:40:03 »
Quote
Quote
Unless you do a lot of towing or have extremely fat and heavy kids I wouldn't bother with air shocks in my opinion.

I've just had standard ones fitted to my Elite and the cars never handled so well.

Air shocks are NOT worth the expence under normal circumstances it would appear.

What about on a Lotus Carlton/Omega? They were fitted with almost exactly the same system, but that was so the stance of the car remained at its optimim so the spoilers worked.

I like my self levelers  ;) ;) :y

I like mine too,or I did until one of the tinkers started leaking
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