Over Boost :(

[sickBoy18]

Hi guys could anyone help me i have recently bought myself mk5 golf gti and its over boosting or so it says on the vag com over boost limit exceded :s only happens sometimes worse when its colder weather check for cracks or splits in all hoses cant see any that i'm aware of also th dv is uprated to the forge one could any one help me who has had this problem or shine some light on this issue could it be the n75 valve etc?  Any awnsers would be very  much appreciated thanks mick

[Tfsi_Mike]

What state of tune are you?

Which colour spring in your Forge DV?

Have you got any idle issues or missfires?  (Potential PCV fault)

[sickBoy18]

Hi is been maped stage one roughly abt 260 bhp and its got turbo back milltek upgraded air intake system. Not sure i didnt put the dv on last owner done it yeah apart from this it runs great goes well too its strange one day the car will be great and can give it the beans and there will be no problems then out of the blue it wil go onto limp mode and no power if u restart the car the problem goes away but i realy want the problem fixed as its startin to bug me lol