Hi guys total noob here

i just bought a mk4 xr3i cabriolet and serviced it all up changed the plugs leads air filter etc etc

trouble is when it gets hot it hunts at idle and sometimes stalls when you push the clutch in driving

i looked at these forums and i guessed it was an air leak somewhere but i cant find it....is there anything else i should be looking at ?

Cheers for any help you can give me

Pete