Guide to cleaning your ISCV

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Guide to cleaning your ISCV

Postby jayrs on Sun Jul 15, 2007 4:39 pm

This guide is for cleaning the ISCV found on a xr2i and frst, although it’s the same for the remote ones on the escorts and is even the same for the ones on the zetecs.

Tools needed

Torx bits
Philips screw driver that fits the screws right
Flat head screw driver
Small paint brush
Cotton buds
Rag


Parts needs

New gasket/gasket paper to make one (maybe)
Copper grease
WD40
Carb cleaner


First off the location of the ISCV
on the FRST and XR2i's (cvh) it is mounted on the side of the inlet manifold, on early cvh XR2i's the remote one was mounted on the side of the sir box, but im not talking about that on in this guide.
On zetec engines the ISCV is located on the front of the inlet manifold below the throttle body.


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first off, if you having idling problems this can be caused buy a gummed up ISCV, the oil vapors build up and make it stick etc, but also, sometimes a dry connection can cause problems, my mates have taken the pi$$ out of me before about this, but I give plugs etc a dab of WD40 and sometimes it sorts the problem, so to them :P jog on :lol:

The iscv is held on with these 4 Torx screw (zetec has 3 and are norm 7mm headed bolts)

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Right, unplug the iscv, remove the bolts holding it on, they are Torx drive so make sure you get the right size bit for them.
Some will be tight, very tight and some might round, if they do, the only way round it is to cut the slot along the head with a saw or drimmel and use a flat head screwdriver.
Anyhow, once removed you have the ISCV in ya hand

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If you have a remote one as found on the escorts it will look like this, and your need to remove it from the mounting plate and remove the back which is the part that makes it remote

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Clean this remote part out with some cleaner then follow the rest of guide for the ISCV it self.

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you can use thinners, or petrol to clean the iscv out, but carb cleaner is in a spray can and the pressure blast some of the cr@p out too so imo its the best stuff

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I norm spray some into a small container you use with the cotton buds and brush

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Before you spray any into the container split the valve from the solenoid

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Don’t lose this small seal

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Starting with the solenoid
The top part will be dirty, the one im using in the guide isn’t that old so it’s not really that dirty but your see the cr@p on yours.
I use a bit of cleaner on a rag and wipe the dirt off the end

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that is all that needs doing really, if its really bad a bit of cleaner on a cotton but worked down the hole a couple of time will be enough to clean it.
at this point you could take the solenoid only and plug it back in and turn the ignition on, the solenoid should move (down the hole) that means its working, if it doesn’t, your problem could be a dead solenoid but its not really that common for them to die completely

Moving on to the valve it self, the far hole with the spring is the valve it self, pictures don’t show it very well but your see it on yours

Valve shut

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Valve open

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To open the valve you have to push on the rod at the end

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Using the cotton buds and the brush clean the insides outs, rotate the rod to spin the whole valve and clean all round, also push the rod in to open the valve and clean the face of the valve and the valve seat, again rotate the rod to make sure the whole valve face is clean
The cotton buds will get dirty very quick so bin them and keep using fresh ones

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Also clean down the sides of the rod too

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Also clean out the intake pipe too with some cotton buds
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At this point most of the stubborn stuff should be loose or removed so it can be blasted out with carb cleaner.

don’t hold it to close to ya eyes as it will come out with force and don’t wear your best t-shirt :lol: :lol:

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You best off doing this outside too BTW
keep blasting till it comes out clear, you know when its clean as it wont be a manky black it will be the light brown color inside (rod and valve etc)

Really a new gasket should be fitted, but sometimes the old one can be reused, just give it a wipe with some cleaner to clean off the oil muck.
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When you come to put it back together, a small wipe of copper grease on the threads of the bolts wont do any harm, it should make it a little easier next time you have to clean it out

Once it’s back together, if the mating face is a little dirty, a bit of cleaner on a rag and wipes it over, give the connections a little dab of WD40 or electrical contact grease if you got some, just to rule out dry connection problems

Refit to the car and away you go, make sure the insides have dried out, should take long and petrol, thinners or the carb cleaner evaporate fairly quickly.

If your car idles bad for a little while give it time, it will settle.


The one I took pictures off in this guide isn’t that old and wasn’t used on the car for long, so its fairy clean anyway but you get the idea for the cleaning anyway

Hope the guide helps :)

Image
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Postby TerryTurbs on Sun Jul 15, 2007 5:34 pm

awesome bro :D
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Postby Brammer on Fri Jul 27, 2007 4:52 pm

Great guide Jay i will do mine next week as she's idling a little funny at the moment.
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Postby jayrs on Thu Aug 09, 2007 3:53 pm

glad ya have found it helpfully guys :)
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Postby knuckles on Sat Aug 11, 2007 11:11 pm

i certainly found this helpful over the phone :lol:
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Postby jayrs on Sat Aug 11, 2007 11:14 pm

was that the call that cost ME £21 :lol: :lol: :lol: :lol:
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Postby knuckles on Sat Aug 11, 2007 11:17 pm

no... :lol:

i was fitting the petrol filler pipe into the fuel tank when you called then. Never again :P
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Postby jayrs on Sat Aug 11, 2007 11:51 pm

:lol: :lol:
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Postby AW3K on Sun Aug 12, 2007 11:31 am

any one any idea why my ISCV is mounted on the bulkhead and not the side of the inlet?

Andy
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Postby jayrs on Sun Aug 12, 2007 1:35 pm

yours is a remote one mate.
if you can change to the one on the side of the inlet by changing the top part of inlet.
i take it you have EFI set up?
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Postby AW3K on Sun Aug 12, 2007 7:26 pm

yeah its a h reg 2i

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is there any advantages of changing it?

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Postby jayrs on Sun Aug 12, 2007 10:10 pm

erm, tbh i cant honetly say as ive never had to do it, but i guess it must have some benift as ford placed it on the side of the inlet in the end :lol:
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Postby TANKRS on Mon Aug 13, 2007 11:56 pm

very helpfull done mine tonight it was full of crap
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Postby jayrs on Tue Aug 14, 2007 12:00 am

glad it was helpful for ya mate. :)
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Re: Guide to cleaning your ISCV

Postby Maff Si on Sat Sep 15, 2007 5:48 pm

Here's my guide to cleaning the ISCV on your Zetec Si, 16v 2i, RS1800 etc

post738119/#p738119
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Re: Guide to cleaning your ISCV

Postby jayrs on Sat Sep 15, 2007 9:09 pm

no different to this guide apart from its not as detailed.
and theres a couple of mistakes in it, you dont need to renew the o ring just if petrol or carb cleaner gets on it, and you dont need to "oil it up" after cleaning
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Re: Guide to cleaning your ISCV

Postby Maff Si on Sun Sep 16, 2007 10:07 am

[quote="jayrs"]you dont need to renew the o ring just if petrol or carb cleaner gets on it, and you dont need to "oil it up" after cleaning[/quote]

^ Blame project, they were his suggestions ^

I posted the link more for the valve removal procedure on the Zetecs cos it's a pain in the ass!
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Re: Guide to cleaning your ISCV

Postby jayrs on Sun Sep 16, 2007 5:02 pm

fully agree there, it is a pain on zetecs :lol:
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Re: Guide to cleaning your ISCV

Postby russ-RST on Tue May 25, 2010 6:17 am

nice guide mate very helpfull even tho i have a hcs atm :( it cant be too different tho aye :) il be doing this later on :) thanks russ
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Re: Guide to cleaning your ISCV

Postby MB7201 on Tue May 25, 2010 10:11 am

A hcs doesn't have one, it just has a plunger controlling idle.
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Re: Guide to cleaning your ISCV

Postby jayrs on Tue May 25, 2010 8:58 pm

cheers dude
as said above, the HSC had a solenoid that pushes a linkage so its different to what the efi ones have
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Re: Guide to cleaning your ISCV

Postby AR-FRST on Tue Jan 14, 2014 9:08 pm

Excellent guide I will be using it tomorrow. Seems easy enough even for a beginner.

Can foam alloy wheel cleaner also work?

Tthank
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Re: Guide to cleaning your ISCV

Postby jayrs on Tue Jan 14, 2014 11:21 pm

No worries mate glad it can help you.

Never used alloy wheel cleaner for anything other than wheels, I know some have a mild acid in it, so prob best to avoid it I would say
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Re: Guide to cleaning your ISCV

Postby AR-FRST on Wed Jan 15, 2014 12:42 pm

[quote="jayrs"]No worries mate glad it can help you.

Never used alloy wheel cleaner for anything other than wheels, I know some have a mild acid in it, so prob best to avoid it I would say[/quote]

Will do. :-)
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