I was wondering if anyone had an experience installing blow off valves in their Volvos. I just recently purchased a Blitz Blow Off Valve for my 2001 Volvo S40 and I heard that our cars don't like the blow off valves because it release too much air and make the sensor believe the engine is leaking. I wanted to know if anyone installed a blow off valve and had any bad experiences with it. Please post your replies. Thanks!