greddy profec b poss problem

[rx7veilside]

my solenoid for the profec has started to act funny
it is teed to external wastegate so one pipe to wastegate and other to compressor side of turbo pre intercooler and post intercooler to other side of wastegate..now sometimes it is sucking air thru the open port of the controller and it is the pipe that runs from the valve to the wastegate that is on vac..doesnt do it all the time so cant be normal..any ideas