Unfortunately I swapped the original system for the Milltek which was on my Boxster S, before I sold it so the refit is an expensive option.
I will get them to check the intake for leaks though. Thanks.
I am not sure if this is related or not but twice I have cold started the car and the engine speed went up to where it normally does and then the engine dies as if the ignition was cut.

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Geoff.