Are they supposed to be open slightly when the car is running at tick over?
im getting a slight hiss from the valve too, the metal part -not the solenoid,
theres no loss in power but ican hear this critter hiss from inside the car now and then,
this problem as only started since ihad it re-mapped,
also the top air pipe for the intercooler sucks inwards when you rev the car not much just a few Mms
like its not getting enough air, Air filter is clean ,
