Strange idle

[quattro rob]

on idle it the rev needle sits fine then after a few secounds or so drops to around 800 then picks back up does this every now and then but is bugging me now, car is fine to drive no problems nothing showing on vag com, so was wondering wat it could be? thanks

 

[Lemon S3]

You might have a small leak in a vacuum pipe somewhere.

 

[badger5]

if you have vagcom, what does block 032 say?

 

[quattro rob]

ill get him to check that tonight bill and will let you know, thanks

 

[Mattfaced]

I have this problem, cleaned throttle body, have a garage try new coils no change, also cleaned maf intake temp sensor and unpluged the maf, could it be plug related?