Gti 6 Idling Issues... Pipe Sucking?

[Din_Din_Din 1 1 Cars]

On my GTI6 engine there is a pipe which comes from underneath the inlet and sucks which makes the engine idle horribly. The lad who i bought it off said it started popping and banging one night, realised that pipe was the problem capped it off and it runs fine but not as good as it was at higher revs... any ideas what could be the problem ? thanks

[Dizzee stuff 33 1 Cars]

Looks like the pipe to the idle contol valve, if so it shouldn't be blocked off.

[Rams_gti6 12 1 Cars]

Isn't it the breather pipe?

[Plumbob 66 1 Cars]

If thats the tube I think it is then mine has got a mini cone filter on it... I always thought it went to the standard air intake tube on a 306?

[Din_Din_Din 1 1 Cars]

Just been and had a look it does go to the idle control valve