ok,

i've always believed all cossie idle speed control valves were the same, but read on a couple of posts 2wd and 4wd's are different.


if so wots different, fitment ? and how can you tell the difference?

Can they be tested?

Thanks Danny

 

Offtopic Dan but how is your motor going ?

Steve.

 

there are defo different versions of cossie iscv, i recently bought one and it was different internally, i have no clue which is which but the one i bought wouldn't allow the car to idle ( dunno if there is an adjustment ? ) but what i had originally on the car had only 1 spring inside, the replacement had 2 springs and doesn't work on my car ( yet ). i'll see if i can make a good 'un of the two, but it looks like they have different resting positions internally

 

They fit the same, but the later 4x4 ones include a diode (indicated on the ISCV by a small diode symbol where the electrical plug goes on).

I believe that they are interchangeable, but the use of the later valve requires the 2 wires to be changed around if using an early ECU ?

 

i used it 4 times in 3 months, so cant really tell you. lol


i might go out in it tonight and strench its legs.

 

i think you may be mixing up the iscv with the TPS?

i have used a mates 4x4 one and it worked fine, however i didn't check what it was like inside

 

Let me Know Dan if your coming this way

Would be good to meet.

Steve.

 

the 2wd iscv has a diode too protect from back emf, where a 4x4 ISCV dont! im sure your ecu has protection from back emf so nothing too worry about

both the same fittings

 

were there early/late/different versions? as i said my original one had just 1 spring inside, the replacement (2nd hand ) had two and wouldn't work

 

Cheers lads

Steve pm me you mobile number, and i'll text you if i do.


so will a 2wd iscv work on a 4x4 car running std loom, ecu etc etc. or vica versa?

 

it will work,they are the same,an escort one looks identical but is different,2wd number is 001 escort is 002.

 

as tim said it will work fine

 

So your sayin, even tho they are different, any ISCV's will work in any cossie's.

So wots the point of the differentess?

 

i never said that,i said the ESCORT cosworth one is different,4x4 saff and 2wd are all the same.

 

because weber wanted too change it,,, the valve is used on alot more cars than just cosworths

 

cheers lads.


gona take mine off this week and test like Sir m Rainbird told me

if not good, gonna go 4x4/escort as been told their better.

 

ok,

i stripped my ISCV, and cleaned it out with brake cleaner and air gun.


Tried the test with ign on (as Mike R advice )
, but with my s8 it dont do anything, so i pluged in my old p8 super 8, and Bang the ISCV does fine on the test, i also got 2 spare iscv's off a mate, cleaned them, and they do the same on the test, (open and shut fully 5-10 times wen ign is turned on)

So refitted my one, and Bang its now workin, so played around abit on the settings on the s8, and idle'n nicely, the only thing is the iscv seems abit slow to adjust the idle (not sure if thats normal, as i've never run it with it connected )

So gonna try the 2 spare ones, and see if there's a difference, and may be borrow my mate brand new one and go from there.

Here's a few pics of the 2 sorts i have, they are all 01 ISCV's

my one off car






a spare one

 

I believe the S8 runs closed loop idle speed control, but obviously doesn't do the cleaning program of the ISCV like the stand one does. Perhaps Simon could engineer this in with a simple software mod, as it will obviously increase the life of this item - otherwise it will become clogged up a lot quicker... .

 

Cheers mike,

could you post that pic you sent me, of your recomended ISCV.

 

Dan,
I can't as I can't download pics from my phone .

 

ok done it for you

Here mike's pic



bit hard to see, but the same as the 2nd (spare) one in my pics.

 

that's the recommended one above? that's the one i already have but the spring has gone weak so it doesn't work properly if only i could find the same size/tension spring on something

 

just been out testing all three used ones i got, with car runnin with a iscv fitted,

i tested the other 2, and all 3 move the same to each other at set duty's

and whilst running with iscv connected i got

0-26% = no rpm change (so still shut)
at 27% duty rpm starts to rise,
at 60% iscv is fully open.


Bud, cant you find someone with a fucked iscv but good spring?

 

probably yeah, i honestly thought the other one i got would do the job, but being different type i'm not sure it will??? car doesn't start with it fitted,and with the original one i have it hunts for ages til warm ( i tested my mates known good valve and car worked fine ) i'll get another i think