check for air leaks because the boost is fluctuating. I had this problem, i boosted at 10psi and dropped down to 6psi. Mine ended up to be a dead actuator, in which id say to you, take it somewhere unless capable yourself, wipp it off and see whether you can physically pull it out.. chances are you'll need a new one or a cossie one. -31 actuator. There £60ish quid, id suggest that, but before you do, check all hoses, air leaks, and gubile clips for gaps ... if you cant see nowt, try the actuator.