Dryslick13

My car has started making a buzzing sound after it starts up. It is coming from the engine area. Only lasts about 30 seconds and goes away once I start driving it. It is a high pitched sound that almost sound electrical. If you have ever heard a bad fuel pump in a Chevy Silvarado it is almost identical. Any idea what it is? Is it something that I should worry about? Did a search but couldn't find any reference to the same type of noise. There is one post with a video that has about the same symptoms but the noise is different than my car's.

Kazual99

This could be your secondary air pump going bad. Next cold start take a listen with the engine bay open and the secondary air pump is on the left hand side of the engine closest to you. I will hunt for a picture.
'
Charles

Kazual99

This is from a previous post on the forum. Not my photo, but the item he is pointing to is a secondary air pump and might be the cause of your noise. Yours may look slightly different.

Charls

logray

+1 SAI pump = normal.

Unless it starts to make a grinding or buzzing noise or doesn't make the noise at all.

It should humm and whirr and make it sound like a vacuum cleaner, but not buzz.

Pac996

It's the squirls under the hood using electric shavers before going out.

Ed 40Jahre

I've also notice the same "hum/buzzing" noise though intermittently at cold start up.
Will investigate with open tail hood and see if the air pump is making the noise.
Thanks for the direction.

Ed

RPMulli

Normal.

logray

100% normal if it has a vacuum cleaner sound. It is also normal for it to come on while you're driving, usually right after it warms up.

There's a good thread around here somewhere... oh, there it is:

http://www.renntech.org/forums/topic...post__p__85708

fpb111

Normal for the dogs to howl before you let them out.
http://www.metacafe.com/watch/216872..._the_dogs_out/