Just bought a 93 940 Turbo from an auction: 131k miles. The idle was cranked up to make it idle more smoothly. I cleaned the throttle body and adjusted the idle per: [URL]http://www.ipdusa.com/ProductsCat.aspx?CategoryID=511&NodeID=767&RootID=629[/URL] It still runs rough. Could it be the idle switch? It has 3 contacts, when I test it with a continuity checker it makes and breaks between two of the poles. But there seems to be no action on any other combination of terminals. Any other suggestions. Thinking of replacing the injectors but thats a few more $$$! Thanks Berk Ott