Sorry to bring in another car problem thread...
My 51 reg seat leon 1.6 petrol has problems,
once warm and coming to a halt, upon dipping the clutch the revs will completely drop, often to around 1-200rpm, then bounce back up and down for a few seconds. Sometimes it will stall completely.
Normal driving is fine, just upon idle it starts 'hunting'.
very intermittent (not done it today).
plugged my cheapo diagnostic thing in, got "system running lean" .
done some research and sounds like it could be a vacuum leak - question is how do i know which are the vacuum pipes and how do i safely check them?
all help appreciated!