I have a 1993 Saab 9000 CSE 2.0 (non-turbo) and on the very top of the engine head at the rear, their is a funny connector at the top with two small pipes attached to it? Does anyone know what this does. I have had a look at my EPC and the closest thing I can find is described as a "Positive crankcase ventilation valve" what the hell does this do? And on my car it seems to be very loose? does this matter?