sounds like a faulty idle control valve as per the scan Dezzy
The Idle control Valve (basically) controls the amount of air let into the inlet manifold when on idle. The valve has a 'Pin' which moves in and out incredibly fast, meaning the engine idle can be controlled accurately.
Common symptoms of a faulty Idle Air control Valve (IAC) are:
Poor idling (you would never have guesed!)
Cutting out when the engine speed drops (approaching bends, roundabouts etc)
High revving on idle
Idle speed going up and down
A diagnostic machine will sometimes point out the IAC is faulty, however, not always.
Sounds like it might be sticking even after youve cleaned it
__________________
Confidence is the feeling you have before you know better . . . . 
Audi A8 D2 3.7 Quattro Sport 1999 FL - Melange
2nd Place Winner - A8-Freunde Annual German Meet 2012 at Edersee
20" x 9" Bentley GTC Wheels with 385mm W12 Front Discs & Bentley Caliper Covers, Front Lowered on Coilovers, Xenons, Combined DRLs and LED Foglights to modified OEM front fog lamp position, Alcantara/Leather, Full Black Alcantara headlining + pillars and blind shelf, Bespoke Flat Bottomed Sports Steering Wheel, Dark Myrtle Wood, Autodim Mirrors, Bose, Blinds, Digital TV, Ski Hatch, Modified rear exhaust section for extra V8 Burble 
Audi S8 D2 Final Edition 2002, Avus Silver with Red Leather Interior
Tiptronic with Sport mode button, Sony rear entertainment package, Bose sound system, Audi Navigation Plus, 20 inch Final Edition alloys, Full Cat Back Stainless Milltek exhaust, giving a great V8 burble
Audi A8L D2 4.2 Petrol with LPG - Ebony Black
Audi A8L D4 FL 4.0T Petrol twin turbo - Havana Black
Audi A2 1.6 FSi Sport - Dolphin Grey with Votex body kit and Red Leather Interior
and some other A8's A8L's and Mercs
Last edited by Architex_mA8tey; 17th November 2012 at 10:34 AM.
|