Recently my 2.0 litre FSI Turbo engine started hunting at idle when warm.
Idle speed starts at 800 RPM, rises to 1500, returns to 800, rises to 1500 in a roughly 10 second cycle.
When cold the idle speed is stable.
I could, I suppose replace all sorts of things to attempt to fix it but I'm hoping an expert can be more accurate !
GSF had "no clue" claiming that they only sell parts.
Thanks for your help, John