Hi, I've got a 2004 1.4 Leon that had started to have an intermittent problem. When cold it seems to run ok, revs at just over 1000rpm. However, when it has warmed up and I stop for a short while on re-starting the revs keep on dropping and then jumping up. This will carry on for about 10 minutes, if I slow drown during this time and drop the clutch the engine will stall. Any ideas please.