Basically sometimes it will hold on full boost no problems, sometimes it will go to hold full boost then drop off a bit, and sometimes it will lose all boost. when it loses all boost it could be ages before it would work again.
I'm pretty sure it's a dodgy/weak actuator, but any help will be appreciated
its on my s14a please help iv also been told its could be a dodgy amul valve
has anyone else had this problem