ive got a 98 A4 1,8 manual and it seems to have a problem idling. If you blip the accelarator it revs as normal but as the revs come down they drop below the normal limit and it feels as thought he car wants to stall. It however doesnt stall but compensates and boosts the revs back up to normal.
Had the cambelt changed recently and then mot'd and it was running all fine then but just recently this has started happening.
any ideas what could be causing this?
Would a faulty coolant sensor cause this problem?
Scanned it with vag com and just the battery power level came up and also '16500: Engine Coolant Temp.Circ Range/Performance'