I am trying to figure out what is making a noise I have. It happens just once at the first movement of the car on start up,no other time. Its kinda like a pumpish noise not to loud. I believe it might be the "air pump" maybe. I have had the noise since I have had the car but 3 days ago it has changed and sounds somewhat like a power steering pump going bad now its still not all that loud but enough for me to worry. I know the sound of the air pump running but does it make another sound when the car first moves? Or is it something else all together? Any help would be awesome. I had no idea how to Google this issue but I did try!
Thanks titus.

 

Search Axle nut TSB. Would help if you could post an audio or video clip to show us the noise.

 

Thats already fixed. Its definitely coming from the front. I don't believe I could actually get one. Its very very fast and only happens once after start up on first movement.

 

Ok. The sound happens at the 12 second mark on this video. Any input from anyone?

http://youtu.be/xZ0a3xUOkP0

 

I see the engine is warm, does it do this EVERY time you start off, or just the first time for the day? I noticed you turned the wheel slightly. Does it make a difference if the wheel stays straight? Just trying to isolate the related system. I'd be wanting to sit under the hood and listen while someone else drives (in a deserted parking lot) to try to localize.if it was the air pump, you wouldn't have to move for the sound to happen. Air pump actuation is independent of vehicle motion.

 

I believe it is the abs pump. But it happens only on first take off after starting the car. Turning the wheel makes no difference from what I have seen. And it takes a good 6 feet before the sound goes off. I found a tsb for the abs pump and they call it a "grunt" it is a abs pump check that makes the sound and apparently is no issue. Why it mskes different sounds from time to time im still not sure. They have a test at honda they can hook up to make the pump cycle through its check and i should hear the same sound. I just have not had a chance to go yet. Thank you for the response.