What tell the idle control valve to do c20xe

[nova_saloon]

Hi, ive got a dodgey idle and have done for a while. but ive replaced the idle control valve a few times for 2nd hand ones at least 5 times, and it still does exactly the same thing when idling, but i unplug it and it idles flat at 1,100rpm. what tells the ecu to do, to tell what the idle control valve to do?

[Adam]

With it unplugged the idle valve will just sit in one position, hence the nice flat idle.

The ecu adjusts the valve depending on coolant temperature etc to change the idle speed for cold/warm running

When you say dodgy idle, as in what? low? up and down?

[nova_saloon]

Search nova c20xe idle on YouTube and there a picture of my clocks, the account name is gpr50bpy or may come up as Philip atkins

[scott.parker]

Search nova c20xe idle on YouTube and there a picture of my clocks, the account name is gpr50bpy or may come up as Philip atkins

https://www.youtube.com/watch?v=JWdl...e_gdata_player

Humm.. Bit lumpy up and down, but not that bad..

[nova_saloon]

It usually gets worse, who's else does it?

[bakerboy83]

I'm about to change my idle valve because of the same thing so I'm no help but interested in anyone's answers

[nova_saloon]

cool let me know how it goes, if it is acting the same as mine then i must know, is yours coil pack or a distributor type engine. as i have replaced my ICV a few times and hasn't changed a thing!

[Benn]

When you've cleaned it. You did re-oil it as i've seen them stick open/closed

[bakerboy83]

Coil pack. Just changed icv it's still doing it so can anyone whats next to look at mine only does it when it warms up if that helps
Cheers

[nova_saloon]

I cleaned all 5 of the ones I've tried, by flushing them
With brake cleaner then oil in them! Yeah mines playing about more so when hot to and I have a coil pack one so we need to work together, where in Hampshire are you? As I'm south London, meet at benn's and annoy him for a bit with questions! Haven't seen him since the last meet I went to!