idle problems

[andyxpress]

Hi
I have a 1990 gti 16v for a couple of days now, all was going well until this morning, car started OK but  the idle was vey irratic going from 2000 rpm to 3000 rpm and back again, not sure if its gets better when warm as i immediatly drove back in to the garage to ask you guys the question. Does anyone know what might be causing this??
thnx for the help

[golfvr6]

Check around the throttle body and inlet manifold for air leaks. Take the idle stabilisation valve off and check how far open it is.

[andyxpress]

Dont mean to sound bumb here but.. wheres abouts is the idle stabilisation valve?

[golfvr6]

On the right hand side of the inlet manifold. If i remember rightly follow the rail for ht leads.