Idle valve?

Looking for this chappie

Top one or bottom one or the whole thing that bolts onto the intake.

Top 1. The one that look like a long nut with plug at the end. Dus it control engine idle? Or idle up when aircon switched on?

think top one is acc valve

If I unplug it nuting happens with the idle even if I put on aircon. Cant get the idle down. It idles a 1500rpm.

It is used for the ac.

Any suggestions how to get idle down? Its gettin quiet nerve recking hearing the engine idle so high

Make sure you don't have a vacuum leak. One of the small pipes by the intake mani.

Goin to remove sensors and housing tomrw to clean them out. Wil check the vac pipes aswel. I thnk aftr 20 odd years they deserve to be replaced

Have you tried adjusting the idle at the screw?

I have yes. With the screw fully closed its idling at 1500

Then I'd do what rat suggested, start looking for air leaks. Or maybe the "choke" / cold start auxiliary air valve is stuck open?

I removed all the sensors yestrday and cleaned them out,replaced all the vac lines aswell. Idle stil high. Tried to feel around intake for any leaks. Could it be intake gasket?