Sigh...
Is there something wrong with my car?
I drove with the windows down today as I left my food bag in the car overnight so it didn't smell too fresh, anyway...when driving, I noticed that under acceleration, when the car changes gear I get a small hissing sound which I'm guessing is normal because of the blow off valve, but when I apply a heavy right foot, I get a constant hissing sound. It sounds like someone is letting air out of a car tyre, that kind of noise, surely it's not normal to always be doing it? You can't hear anything when the windows are up
What is going on?