Repairing the SCV Suction control valve

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Re: Repairing the SCV Suction control valve

Postby Brett's on Sun Feb 21, 2016 12:18 pm

Hi guys, just to confirm, replacing the scv with a new one requires the dealer to put the mutt and calibrate it, or is it just a matter of removing old scv and installing the new one ?
Cheers brett
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Re: Repairing the SCV Suction control valve

Postby Brett's on Sun Feb 21, 2016 12:19 pm

Sorry but can a mechanic other than a dealer be able to do a calibration ?
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Re: Repairing the SCV Suction control valve

Postby Brett's on Sun Feb 21, 2016 12:40 pm

Hi guys, just to confirm, replacing the scv with a new one requires the dealer to put the mutt and calibrate it, or is it just a matter of removing old scv and installing the new one ?
Cheers brett
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Re: Repairing the SCV Suction control valve

Postby srb on Sun Feb 21, 2016 1:02 pm

It's recommended to get the SQL done. However it still runs ok with out it... Mine went with out the SQL for over 10k kms and I hardly noticed the difference.
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Re: Repairing the SCV Suction control valve

Postby Cowboy Dave on Sun Feb 21, 2016 1:02 pm

Best practice is to use the MUT3 to perform a fuel pump (re) initialisation and Small Quantity Learn (aka SQL) when replacing with a new item.

Some will run okay without this, and others will run like crap if you don't get it done. I imagine it has to do with how far the learned values at that point are from the ideal values for the new SCV.

There are tools other than the MUT3 that will be able to do this, but the problem is finding a workshop that actually has such a device.

If you stick up your location someone may be able to point you to a non-dealer who can handle it for you.
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Re: Repairing the SCV Suction control valve

Postby RHKTriton on Sun Feb 21, 2016 9:23 pm

I installed a new one and let the engine idle for around 20mins.

Have driven it normally since with none of the symptoms of the original 'sticking' one.

Wouldn't hurt to get the mutt to have a sniff how things are going periodically, say after a major service interval including the valve setting.
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Repairing the SCV Suction control valve

Postby viking shippy on Sat Mar 05, 2016 11:20 am

I've just polished my scv as described don't remove the battery it's easy to access via the wheel arch..remove the plastic splash guard remove the Allen bolts blowing away dirt first and remove scv then the wiring plug..once its losse..as it's easier to push the relise clip...tight but doable...with short Allen keys 07 ml
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Re: Repairing the SCV Suction control valve

Postby viking shippy on Sat Mar 05, 2016 11:23 am

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Re: Repairing the SCV Suction control valve

Postby viking shippy on Sat Mar 05, 2016 11:24 am

Now to put the battery back !!!!!....oh Waldo!!!
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Repairing the SCV Suction control valve

Postby viking shippy on Sat Mar 05, 2016 2:19 pm

I keep getting sticking scv codes but are getting less frequent...the dead spot in third now is what I call surging but hardly noticeable guys do you recon I need a new scv as its 210k now
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Re: Repairing the SCV Suction control valve

Postby borngeek on Sat Mar 05, 2016 2:24 pm

Yes...
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Re: Repairing the SCV Suction control valve

Postby viking shippy on Sat Mar 05, 2016 3:35 pm

Thanks geek
It's coding at idle constantly...ill get a new one on Monday...other than being slow of at the lights and annoying clearing codes does it cause any damage...as when it codes it drives like a slug..
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Re: Repairing the SCV Suction control valve

Postby Tony on Sat Mar 05, 2016 4:55 pm

No damage, that's the beauty of the SCV working on supply side of HP pump.
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Re: Repairing the SCV Suction control valve

Postby viking shippy on Sun Mar 06, 2016 5:55 am

Thanks tony I suspect mines worn out..cause polishing it made it worse..
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Re: Repairing the SCV Suction control valve

Postby RHKTriton on Sun Mar 06, 2016 9:00 am

First polish (around 140k) worked great. Required a second about 30k down the track - obvious trend to the end.

Shop around for a replacement - I got an identical spanker off an eBay supplier for $ 160 delivered and all symptoms gone.

Off topic: VS's pic through the wheel well suggests this is probably the best path to the oil pressure switch. Much involved in getting a second oil sensor in there?
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Re: Repairing the SCV Suction control valve

Postby viking shippy on Sun Mar 06, 2016 10:18 am

Ah who's got a scv sitting on their shelf...I need one today ,work tomoz..Cannot wait 3-5 days for eBay...is hairy clearing codes on the fly..
Thanks rhk mines stuffed thank god for the scan gauge...and yes if I cannot see what I from under the bonnet I attack from the flanks...
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Re: Repairing the SCV Suction control valve

Postby Cowboy Dave on Sun Mar 06, 2016 10:58 am

I do, but you'd have to get to Sydney this arvo.
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Re: Repairing the SCV Suction control valve

Postby viking shippy on Sun Mar 06, 2016 1:43 pm

Might be keen pm me
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Re: Repairing the SCV Suction control valve

Postby Tony on Sun Mar 06, 2016 1:59 pm

You could always pm him

I might have a spare with me but also in Sydney.

For the record, I'm not a big fan of people pulling these out and trying to restore them.

Just remember the high pressure pump is very sensitive to contamination before we talk about injectors.
Those SCVs are prone to failure anyway.
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Repairing the SCV Suction control valve

Postby viking shippy on Sun Mar 06, 2016 2:44 pm

I water blasted the area (let it dry) and practiced good housekeeping using carby cleaner,compressed air,new orings ..I won't be frign around with one again...r&r...for me..
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Re: Repairing the SCV Suction control valve

Postby viking shippy on Sun Mar 06, 2016 2:48 pm

Thanks for the offer tony...id hate to tackle Sydney trafic and clear a code every time i stop at traffic lights lol..
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Re: Repairing the SCV Suction control valve

Postby viking shippy on Sun Mar 06, 2016 2:53 pm

Tony do I need to get it recoded to the injector pump and a sql..
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Re: Repairing the SCV Suction control valve

Postby Cowboy Dave on Sun Mar 06, 2016 3:32 pm

Also try rotating 180 degrees. You never know your luck. Seems to work for some
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Re: Repairing the SCV Suction control valve

Postby Tony on Sun Mar 06, 2016 4:24 pm

Shippy, when new goes in it is recommended although they will run OK with out and do eventually self learn.
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Re: Repairing the SCV Suction control valve

Postby viking shippy on Sun Mar 06, 2016 4:27 pm

Did that twice I suspect it's worn out and gets stuck and the solinoid is weak.,,really for 150 on eBay...why bother..frign around with one risking rooting your injectors..lesson learnt...
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