dave_y

iTrader: (4)

can anybody point me in the direction of where i can buy a new idle speed control valve.

i reckon my one is knackered as the car randomly idles all over the place and its beginning to annoy me.

will they still be available from ford?

thanks.

vroooom ptssssh

prob best getting one 2nd hand, and it;s an auxilliary air device lol

dave_y

iTrader: (4)

ah right is that the part that sits next to the fuel distributor?

Tony Turbo

I think you must be thinking of the metering unit, where the air filter sits???

S2's don't have an ISCV, unless they have been converted to EFi


What makes you think yours is "knackered"?

dave_y

iTrader: (4)

my car has been idling all over te place recently.

the revs would drop when it became warm to around 500rpm.

i adjusted the idle speed screw so that they were just below 1000 (when warm)

when i started the car from cold it idled at 1,200 revs and fell to just under 1,000 when warm then after a little while after this they fell to 500rpm again and stalled at a roundabout (again).

some people have said to check for leaks on the inlet vacuum hoses but there are no obvious splits or anything and i don't know of a way to check them more specifically.

i have also heard that the idle speed control valve (auxillery air device....) is a common weak spot so i thought i would get a new one and see if the problem is solved.

sorry for the 'essay post'! lol

Tony Turbo

Look inside the throttle body, see if if it is full of black shit. If it is take the throttle body off and PROPERLY clean it all with carb cleaner and replace with new gaskets.

dave_y

iTrader: (4)

you mean the throttle body on the inlet manifold...?

how do you go about removing all the inlet vacuum hoses?

i assume its different to taking the hoses off a normal escort for example...

Tony Turbo

Yeah, throttle body off the inlet.

To remove the hoses, undo the hose clips and pull the hose lol, becareful though, the one under the throttle body itself can be a bit of a bitch, as it is harden plastic, I used to undo the the other end (by the Auxilary Air Valve).

You could try squirting some carb cleaner down the throttle body and into the manifold, then wipe with a rag as far as you can reach in situ to see if it helps.

Tony Turbo

The car will run funny for about a minute while it burns off the carb cleaner, so don't be worried.

dave_y

iTrader: (4)

ok mate thanks for the advice will give it a go tomorrow.

i always thought that because they were vacuum hoses you couldn't just whip them off!

while they are off i will see if i can find any leaks that i may have missed...

JesseT

This is the old-style Bosch auxiliary air device which is a passive idle speed control valve:


It sits under the inlet manifold and is used to bypass the throttle body for extra air. To check the operation:
1. Remove the device.
2. At room temperature, look through the air hole and you should see around half of the port open. Put it in to a frindge for a while and then the port should be fully open. Finally connect 12V to the connector to heat it up and the port should gradually fully close itself in a minute or two.