Automotive Forums .com - the leading automotive community online! Automotive Forums .com - the leading automotive community online!
Automotive Forums .com - the leading automotive community online! 
-
Latest | 0 Rplys
Go Back   Automotive Forums .com Car Chat > Engineering/Technical
Engineering/Technical Ask technical questions about cars. Do you know how a car engine works?
Reply Show Printable Version Show Printable Version | Email this Page Email this Page | Subscription Subscribe to this Thread
 
Thread Tools Search this Thread
Old 01-25-2011, 08:40 PM   #1
Bootuh
AF Newbie
 
Join Date: Jan 2011
Location: Marlboro, New Jersey
Posts: 2
Thanks: 0
Thanked 0 Times in 0 Posts
Question Noise coming from engine the moment I release emergency brake

Picked up my new 2011 Mazda 3 today. I noticed that when the car is in park and the emergency brake is up, the car is nice and quiet. The moment I take the emergency brake off, there is a subtle hum coming from the engine. When I turn the wheel left and right, it changes the pitch of the hum. It makes this noise regardless of whether the car is in drive or park- its the moment I take the emergency brake off is when the hum starts. It's not loud (but I can definitely hear it) and to be honest I'm not worried about it- the car rides great and has just under 200 miles on it. I just thought maybe someone here could give some input as to what it may be. I'm going to give it two-three weeks and if it does not go away/ease up I'm going to stop by my dealer.
Bootuh is offline   Reply With Quote
Old 01-27-2011, 07:30 PM   #2
MagicRat
Nothing scares me anymore
 
MagicRat's Avatar
 
Join Date: Dec 2003
Location: City of Light
Posts: 10,700
Thanks: 12
Thanked 79 Times in 74 Posts
Re: Noise coming from engine the moment I release emergency brake

My first guess is that it is a normal noise produced by the electric-powered hydraulic pump for the power steering system. The system comes under more load when you turn the wheel, hence the change in pitch.

I am not sure, but it would make sense the pump is shut-down when the parking brake is on, in much the same way that daytime running lights shut-off when the parking brake is applied.
MagicRat is offline   Reply With Quote
 
Similar Threads
Thread Thread Starter Forum Replies Last Post
emergency brake light comes on freakyfire05 ZX2 8 02-11-2010 10:19 AM
96 Cutlass Supreme w/ humming noise coming from under the back of the car chrisluna Cutlass Series 1 09-28-2009 12:11 PM
noise coming from under the hood near the brake fluid container madmaniac 4Runner/GX470 2 12-20-2004 10:30 PM
dull noise coming from engine.... dek Engineering/Technical 7 10-17-2002 11:41 PM
Weird ass noise coming from engine Edho2002 Nissan Cefiro | Nissan Maxima | Infiniti I30 | Infiniti I35 2 08-15-2002 05:03 PM

Reply

POST REPLY TO THIS THREAD


Bookmarks
Go Back   Automotive Forums .com Car Chat > Engineering/Technical

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -5. The time now is 09:19 PM.

Community Participation Guidelines | How to use your User Control Panel

Powered by: vBulletin | Copyright Jelsoft Enterprises Ltd.
 
 
no new posts