PCV Valve Messed Up
I have a working PCV valve in my car but i just wanted it to be replaced because i had no idea how old it was. I bought one from autozone and it is the exact same as the one i already have but when i start my engine it almost stalls then it gets better. Also it hisses a lot when i turn the car off and trust me there arent any leaks because when i do this with my old valve all these symptoms go away. Did i just stumble on a bad valve or did i do somethign wrong?