Originally Posted by
JAMMINKRAZY
Posted this in the OS thread as well...
Air leak!

A common source for air leaks on the v-specs is at the carb pinch bolt. With the v-spec one not being o-ring sealed, there's really nothing sealing it. Anytime I've seen those symptoms on a v-spec it has been from an air leak.

I have too... from an air leak in the bottom of the case that cracked. Not sure if this is a problem on the new ones or not... but it is worth checking IF you don't find anything else causing it.