revs dropping when coming to a stop !!

[boomtown]

as above my revs have started dropping when coming to a stop at lights , junctions etc, they then shoot back to normal with a bit of a jolt
Any ideas ??
Audi a4 3.0 quattro tip
Cheers

 

[boomtown]

Anyone ??

 

[Mike.M]

Sticky throttle body I would say.

When the butterfly shuts it must be sticking and not allowing for a minor adjustment at idle.

Take it off and give it a clean, but be gentle.

 

[boomtown]

Looks like abit of a pig on my car, any help appreciated on removal

 

[boomtown]

Well, cleaning throttle body made no difference !

 

[boomtown]

Could this be a dodgy o2 sensor ??

 

[quattrojames]

If it was a manual car I'd suggest the clutch switch, I guess the auto must have something similar?