Repairing the SCV Suction control valve

Petrol, gas, fuel tanks etc

Re: Repairing the SCV Suction control valve

Postby tritonmal on Wed Feb 04, 2015 5:56 pm

Mines dropping revs at idle and not idling smoothly. Would this be an indication of scv problems?
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Re: Repairing the SCV Suction control valve

Postby biggibbo on Wed Feb 04, 2015 6:09 pm

Have you turned the a/c off
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Re: Repairing the SCV Suction control valve

Postby tritonmal on Wed Feb 04, 2015 6:35 pm

Ac off most he time. Revs appear to drop Down to 550-500 rpm then pick up again. And yes ac is off
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Re: Repairing the SCV Suction control valve

Postby biggibbo on Wed Feb 04, 2015 7:35 pm

Not sure on the SCV. Mine caused surging at RPM. Idle was normal. 650 rpm is normal idle, so something seems wrong. How's your battery? My rpm at idle was all over the place when my battery was dying.
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Re: Repairing the SCV Suction control valve

Postby littleJohnny on Fri Feb 20, 2015 4:56 am

Seems this scv problem is caused by dirty fuel.
Anyone know the filtration size of a genuine filter?
Also, what brands of filters are you blokes using?

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Re: Repairing the SCV Suction control valve

Postby Cowboy Dave on Fri Feb 20, 2015 7:49 am

The latest mitsy filter is finer than they used to be but still not as fine as the better secondary filters. I can't remember exactly but 6 micron rings a bell? Anyway I run a 2 micron racor Parker as a secondary for better protection.
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Re: Repairing the SCV Suction control valve

Postby littleJohnny on Mon Mar 09, 2015 12:55 pm

Thanks Dave. I was asking cause the fellow I spoke to said to put it before as the factory one is fine enough and it would cause problems like too much suction required to draw through them.
One other bloke on here was saying 10 microns. But 6 then 2 microns should Br fine.
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Re: Repairing the SCV Suction control valve

Postby Cowboy Dave on Mon Mar 09, 2015 1:41 pm

I know a few blokes running the exact same filter with lots of miles and we've not had an issue yet.
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Re: Repairing the SCV Suction control valve

Postby sthnbelle on Tue May 05, 2015 6:01 pm

The 09 MN with 80k on it started to surge bad on the way to work this morning, sounded like a PP rotary it was flaring that bad. The CEL light came on but I made to work and home.

35 minutes to rip out the battery and SCV, clean it up as per the instructions provided and then back in.

Like a dream but the CEL light remains on, a bit of tape over it so I can't see it should fix that problem :shock:

Thanks to this forum, what feels like a disaster is about to occur was fixed between getting home and before dinner was served.

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Re: Repairing the SCV Suction control valve

Postby borngeek on Tue May 05, 2015 6:03 pm

The CEL will go away ;)

Glad to hear of another success. Well done!! :D
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Re: Repairing the SCV Suction control valve

Postby Cowboy Dave on Tue May 05, 2015 6:12 pm

I had a few luminaries (qualified mechanics actually) carrying on the other night on Facebook saying this was not a good idea etc and how you should just put new ones in. One bloke was on his third SCV. Real life experience as demonstrated in this thread trumps that in my book every day of the week.
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Re: Repairing the SCV Suction control valve

Postby sthnbelle on Tue May 05, 2015 7:21 pm

My brother is a mechanic but his apprenticeship was in a country workshop where every effort was made to repair or rebuild the part before considering to replace.
His skills and knowledge is highly regarded in the region and many workshops want him to work for them as most now have no idea on refurbishment and addressing the problems with older vehicles or fixing one off problems.
The BIL was trained in a Holden dealership, still country based but he has the mentality of bin and replace. The time and effort to refurbish does not make the money for the boss is the mantra.

I know which I would rather have work on my car, but still prefer to do it myself.

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Re: Repairing the SCV Suction control valve

Postby AnOldFart on Wed May 06, 2015 12:21 pm

Cowboy Dave wrote:I had a few luminaries (qualified mechanics actually) carrying on the other night on Facebook saying this was not a good idea etc and how you should just put new ones in. One bloke was on his third SCV. Real life experience as demonstrated in this thread trumps that in my book every day of the week.

That's a pretty good example of yours right there "CD" of the difference in approaches between Engineers and Techs.
Engineers visualise in their brains what they can theoretically do according to the text books.
Techs on the other hand -actually implement- what they -can- do with their own hands.... ;)
As you say, the "real life experience as demonstrated" on this Forum is what makes it such a great information resource for Triton owners.... :D
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Re: Repairing the SCV Suction control valve

Postby Naff on Wed May 06, 2015 5:20 pm

That's a bit of an over generalisation.
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Re: Repairing the SCV Suction control valve

Postby RHKTriton on Wed May 06, 2015 5:38 pm

The refurbished scv is going great guns.

I just want that Mutt alternative now so I can tune my own engine.
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Re: Repairing the SCV Suction control valve

Postby RHKTriton on Wed May 06, 2015 5:53 pm

The refurbished scv is going great guns.

I just want that Mutt alternative now so I can tune my own engine.
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Re: Repairing the SCV Suction control valve

Postby Tryton08 on Sun May 24, 2015 6:31 pm

Just a quick question I have noticed that over time my engine seems to be idling a lot louder (diesel knock) then it used to. I have polished the spool in the scv valve could this be causing it or should I be looking else where. I can't seem to find anything loose on the left hand side. Only notice it at idle and seems to drive fine othwise any thoughts will be greatly appreciated.
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Re: Repairing the SCV Suction control valve

Postby GLRkenny on Sun May 24, 2015 6:39 pm

When was the last SQL done?
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Re: Repairing the SCV Suction control valve

Postby Tryton08 on Sun May 24, 2015 6:46 pm

About 12 months ago
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Re: Repairing the SCV Suction control valve

Postby Tryton08 on Sun May 24, 2015 6:56 pm

Forgot to add problem seems to be slightly worse or noticable when the chip is connected. Atm I have the chip test connector in place not running chip.
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Re: Repairing the SCV Suction control valve

Postby GLRkenny on Sun May 24, 2015 7:35 pm

SQLs are done to minimise diesel knock, I'd start there
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Re: Repairing the SCV Suction control valve

Postby daveygravey on Tue Jun 16, 2015 4:45 pm

Hi Guys, Pretty new here, having a few problems with my mn, fuel pressure wont hold, prime it up tight and within a minute will require 4 or 5 more pumps, wont idle or drive under 2000rpm.
could this be the scv?
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Re: Repairing the SCV Suction control valve

Postby coughy on Tue Jun 16, 2015 5:25 pm

as you said it is worse with the chip in
it is usual that the scv is worse when chips are installed
tony would be better to elaborate on this
get the sql done makes a big difference
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Re: Repairing the SCV Suction control valve

Postby Tryton08 on Tue Jun 16, 2015 9:32 pm

Booked in this thursday at local dealer to get the sql done. Hopfully makes a difference. The service manager said to disconnect chip before I drop it off.
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Re: Repairing the SCV Suction control valve

Postby ag9111 on Tue Jun 16, 2015 9:49 pm

daveygravey wrote:Hi guys, Pretty new here, having a few problems with my mn, fuel pressure wont hold, prime it up tight and within a minute will require 4 or 5 more pumps, wont idle or drive under 2000rpm.
could this be the scv?

sounds like you have a leak somewhere.
Look for diesel leakage in the engine bay
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