Hey wassup all,

The other day I noticed when I started the car it made a humming sound its a distinct sound that can be heard over the engine. Its really loud from inside the car, I guess because the sound travels through the firewall. When I put the car into drive the sound got louder. Then, the moment I started to accelerate it sounded like the pitch was getting higher, then I guess it muffled out after I picked up speed. But, it would come back at idle. Does anyone have any idea what the hell I'm talking about?

 

If you have and intake, it might be that. I know mine humms a little. Other than that im not sure.

 

its has to be an intake my humms a lot and i can hear or at least my gf can hear me drive into my apt complex and i live in the back on the complex but i have a shorty but the shortys hum louder than a cai

 

could also be a header leak, but i would think that that would get louder as you accelerate.