Hey Guys, When cold and I start up my car, there is a noise that kind of sounds like a Jet Engine and goes away once the temperature starts coming up. It comes from the vacuum pump area (rear right of engine compartment). Do you guys have this noise too? Thanks, Chris
It's normal. BTW, that jet engine sound is cool, right? It's secondary air injection for cold start to prevent mixture being too rich....I think. Need someone with better knowledge of emissions to confirm.
