VTS funny noise wen starting.

[Mr_X]

when i start my mk2 vts sometimes it makes a wooosh noise, only lasts for bout 3 seconds.

any ideas?

[fossie]

That could be the EGR valve matey........heard that only comes on for a short period to aid starting/running.........

[JimoVTR]

NOS pressure build up

[Mr_X]

cheers for your help guys