Cruise & dodgy idle speed

[Chopsdad]

And I've just had the top of the hose off where it joins the cam cover and poked around inside with my finger - all clear except for a trace of nice fresh oil.  No gunk.  

[Auto Addict]

And I've just had the top of the hose off where it joins the cam cover and poked around inside with my finger - all clear except for a trace of nice fresh oil.  No gunk.  

[hotel21]

No real offer of a cure from me, other than to say I have a similar situation with my 3 ltr manual.

With the original (freshly cleaned) Idle Valve installed, car starts from cold OK, sits circa 1200 revs for a few minutes (think this is normal) then settles to 500/600 revs idle when warm.  Sometimes revs settle at 2000 for no reason, can be stationary/neutral or when the car is being driven.  Depressing the clutch sees the revs rise.  Similar effect to cruise control jamming on.

Fitted alternative (freshly cleaned) ICV from scrappies.  No 'cold start' rise in reves, idle is 1000, no hunting or increase in revs any other time.

Swapping the ICV's around simply swaps the faults/characteristics.  When the revs are being held high if I remove the electrical connector at the rear of the ICV then the revs fall and get a warning light on the dash.  Reconnect, revs stay low/where they should be for a while, but then can rise.  warning light goes out again.

[rpont]

When the revs are being held high if I remove the electrical connector at the rear of the ICV then the revs fall and get a warning light on the dash.  Reconnect, revs stay low/where they should be for a while, but then can rise.  warning light goes out again.

Engine should stop then due to lack of air as ICV closes by the spring. Are your throttle bodies clean and butterflies closing properly?

I hope that's right because the butterflies on mine are closed and the engine stops if I unplug the ICV.

[Chopsdad]

When the revs are being held high if I remove the electrical connector at the rear of the ICV then the revs fall and get a warning light on the dash.  Reconnect, revs stay low/where they should be for a while, but then can rise.  warning light goes out again.

Engine should stop then due to lack of air as ICV closes by the spring. Are your throttle bodies clean and butterflies closing properly?

I hope that's right because the butterflies on mine are closed and the engine stops if I unplug the ICV.

I don't have an ICV as its DBW but throttle housing & breathers are now spotless.  Butterfly does not close properly - see clip http://s123.photobucket.com/albums/o317/chopsdad/?action=view&current=MVI_1237.flv

[Chopsdad]

Sorry guys I seem to have pissed about a bit here - please post any helpful replies to this thread http://www.omegaowners.com/forum/YaBB.pl?num=1167604887  Cheers