I haven't popped the bonnet yet it's a bit dark. Just out of the blue I'm over boosting, I've got a greddy b-spec 2 boost controller. Be for it was holding 14.5psi very well, the boost controller is working because it stops it at 18psi and drops it back down, any ideas on where to look first.

 

Could it be the colder weather

 

Colder weather highly probably.

Turn your boost controller down.

 

yes, it was the weather. I just can not be leave it makes that much of a difference.