Brake Pedal Pulsating - Drive Accord Honda Forums

Go Back   Drive Accord Honda Forums > Honda Accord Main Forums > The 8th Generation

Drive Honda Accord Forums
Reply
 
Thread Tools Search this Thread Rate Thread Display Modes
  #1  
Old 06-27-2009, 01:19 PM
cwazyboi cwazyboi is offline
1st Gear
 
Join Date: Jun 2009
Posts: 13
Thanks: 0
Thanked 0 Times in 0 Posts
Brake Pedal Pulsating

i've been lurking around the forums for quite some time now, but finally registered.
1. I noticed that from a stop i let the car roll, no gas pressed, and if i press the brake then it pulsates while its pushed in. has anyone else noticed that?

2. When im coming to a stop from regular speed (40-45mph) then the car kind of jerks a little when the brakes are pressed, im thinking when the gearbox is downshifting. I notice that everytime i drive the car but when im in the passenger seat, when gf is driving, then either im not paying any attention, or maybe it isnt happening, i dunno.

any suggestions on this? i cant take the car to the dealership unless i really need to, becasue it is my daily and plus i get off work only 20 minutes before the dealership closes.
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2  
Old 06-27-2009, 01:21 PM
rszappa1 rszappa1 is offline
6th Gear
 
Join Date: Feb 2008
Posts: 1,588
Thanks: 0
Thanked 5 Times in 5 Posts
Might be warped rotors...
Reply With Quote Quick reply to this message
  #3  
Old 06-27-2009, 01:27 PM
cwazyboi cwazyboi is offline
1st Gear
 
Join Date: Jun 2009
Posts: 13
Thanks: 0
Thanked 0 Times in 0 Posts
damn really? i havent ever hit the brakes at freeway speeds and i am pretty cautious about how i drive. but what can cause warped rotors and what are the signs, like any marks or something on the rotors that could help give that away?
Reply With Quote Quick reply to this message
  #4  
Old 06-27-2009, 01:44 PM
YRMed YRMed is offline
Leased a VW_My life ****s
 
Join Date: Dec 2008
Location: NY/NYC
Posts: 2,105
Thanks: 0
Thanked 2 Times in 2 Posts
Quote:
Originally Posted by cwazyboi View Post
damn really? i havent ever hit the brakes at freeway speeds and i am pretty cautious about how i drive. but what can cause warped rotors and what are the signs, like any marks or something on the rotors that could help give that away?
How many miles on the car? Do you still have original brake pads?

With the Accords, the front brakes "warp" quite easily. Although, I'm under the impression that they rarely actually warp, I'll explain in a bit.

Brake rotor warping occurs when you heat up the brakes to a very high degree from hard use (sometimes abuse). Hard use is a situation where you are coming to a more or less sudden stop from highway speeds, ie. Slowing down from 80mph to 40mph in a sudden maneuver. The heat that is produced by the friction makes the rotor more malleable and therefore more prone to change shape slightly. This isn't always the case, in fact, i think this case is pretty rare. I think more often than not, the brake pad material melts onto the rotor and creates an uneven braking surface, therefore giving you the pulsation. In order to remove the deposit, you can take some sand paper and clean the rotors braking surface with it in a light, circular motion. And, there is no need to use a low grit sand paper. Use a finer grit sand paper because it is more gentle.

Occasionally, the deposit is small and will work itself out with the use of the brakes. However, if this problem has been happening for a while, you'll need to take action and use the sand paper procedure and if your rotor is actually warped, you may need to get it machined or replaced.

I hope this helps.
__________________
'12 VW Jetta 2.5/5spd lease - WORST decision ever
'11 Infiniti G37x - Sold
'09 TW 6-6 - Sold 1/1/2011
Reply With Quote Quick reply to this message
  #5  
Old 06-27-2009, 02:38 PM
cwazyboi cwazyboi is offline
1st Gear
 
Join Date: Jun 2009
Posts: 13
Thanks: 0
Thanked 0 Times in 0 Posts
i have about 26xx miles on it right now, and like i said i havent had any hard braking situations.
Reply With Quote Quick reply to this message
  #6  
Old 06-27-2009, 09:34 PM
Aceman196's Avatar
Aceman196 Aceman196 is offline
6th Gear
 
Join Date: Nov 2008
Location: Monroe NC.
Posts: 1,314
Thanks: 0
Thanked 0 Times in 0 Posts
It is not just hard braking that warps the rotors. It can also happen because of frequent braking and holding the brake for a long time. The build up of heat is what does the damage.
__________________
07 Accord EX-L V6 6spd(TSB)
Night Hawk Black
25% Tint all round
2 Door
USA-SPEC PA15 HON2
Reply With Quote Quick reply to this message
  #7  
Old 06-27-2009, 09:41 PM
Gosha's Avatar
Gosha Gosha is offline
Vtahk didnt kick in
 
Join Date: Jul 2008
Location: Philadelphia
Posts: 4,109
Thanks: 0
Thanked 1 Time in 1 Post
Send a message via AIM to Gosha
have you washed your car after a drive? if you sprayed the wheel much, the water that was in contact with the hot rotor will warp it overtime if you keep doing it
__________________
2011 Accord Coupe EX-L V6/Navi PMM
Reply With Quote Quick reply to this message
  #8  
Old 06-28-2009, 01:26 AM
Mechanic Mechanic is offline
5th Gear
 
Join Date: May 2009
Posts: 612
Thanks: 4
Thanked 38 Times in 25 Posts
http://www.stoptech.com/tech_info/wp...rakedisk.shtml
Reply With Quote Quick reply to this message
  #9  
Old 06-28-2009, 06:26 AM
jmagl jmagl is offline
1st Gear
 
Join Date: Jul 2008
Location: Ontario, Canada
Posts: 21
Thanks: 0
Thanked 0 Times in 0 Posts
Likely a warped rotor. My EX-L had 15 K miles when this happened. Dealer machined the rotors under warranty. Wife drives this car and is not all hard on the brakes. I've never had a car with this problem so early. That plus the "normal" flickering headlight when the A/C comes (upgrading to a higher capacity battery is a ridiculous fix), rattle in the rear parcel shelf (3 trips to the dealer for this already) makes me so happy this is a lease.
__________________
jmagl
'08 Accord EX-L Auto
Reply With Quote Quick reply to this message
  #10  
Old 06-28-2009, 05:28 PM
LCodd6 LCodd6 is offline
1st Gear
 
Join Date: Jun 2009
Location: Indiana
Posts: 6
Thanks: 0
Thanked 0 Times in 0 Posts
jmagl, Honda has a service bulletin on the noise coming from the rear shelf. It's a very easy fix, as your dealer and make sure they know about it
Reply With Quote Quick reply to this message
  #11  
Old 06-29-2009, 05:11 AM
PMCErnie's Avatar
PMCErnie PMCErnie is offline
2009 EX-L Taffeta & Ivory
 
Join Date: Nov 2008
Location: Richmond, VA
Posts: 311
Thanks: 0
Thanked 0 Times in 0 Posts
Warped rotors are not all that uncommon in a new car if folks don't break in the brakes properly. I recall picking up a new BMW in Frankfurt, setting out immediately on vacation and driving the car too hard on the autobahns. When we got to Utrecht, Holland the rotors were shot and needed repair. Total milage? About 400 miles! '>)
__________________
2009 Accord EX-L (Taffeta/Ivory) w/XM radio and 6 CD player

2005 Ford Five Hundred SEL (Silver/Grey)
Reply With Quote Quick reply to this message
  #12  
Old 06-29-2009, 09:47 AM
RinconVTR RinconVTR is offline
4th Gear
 
Join Date: Jun 2007
Posts: 473
Thanks: 0
Thanked 1 Time in 1 Post
Quote:
Originally Posted by YRMed View Post
How many miles on the car? Do you still have original brake pads?

With the Accords, the front brakes "warp" quite easily. Although, I'm under the impression that they rarely actually warp, I'll explain in a bit.

Brake rotor warping occurs when you heat up the brakes to a very high degree from hard use (sometimes abuse). Hard use is a situation where you are coming to a more or less sudden stop from highway speeds, ie. Slowing down from 80mph to 40mph in a sudden maneuver. The heat that is produced by the friction makes the rotor more malleable and therefore more prone to change shape slightly. This isn't always the case, in fact, i think this case is pretty rare. I think more often than not, the brake pad material melts onto the rotor and creates an uneven braking surface, therefore giving you the pulsation. In order to remove the deposit, you can take some sand paper and clean the rotors braking surface with it in a light, circular motion. And, there is no need to use a low grit sand paper. Use a finer grit sand paper because it is more gentle.

Occasionally, the deposit is small and will work itself out with the use of the brakes. However, if this problem has been happening for a while, you'll need to take action and use the sand paper procedure and if your rotor is actually warped, you may need to get it machined or replaced.

I hope this helps.
This can be true if the brake vibrations are felt thru the car...not the pedal. And sand paper does not remove enough material to do any good. BUT a fresh bed in procedure *can* cure the problem, but not often.

But who cares? Itís the same old problem and fix as its always:
Turn or replace the rotors & new pads.

If it happens often, try a new combination of pad & rotor. I think the Honda OEM pads & rotors are a horrible match on most of their vehicles. (Iím on my 3rd new Honda)

Rotors and pads can withstand a lot of abuse, but Iíve found those that drag the brakes and make stops longer than normal thinking they are saving the brakes are making things worse. Stop normally. Use the brakes. Donít baby them, and donít abuse them.
Reply With Quote Quick reply to this message
  #13  
Old 07-31-2009, 10:58 PM
listen to remix listen to remix is offline
Search.
 
Join Date: Jun 2008
Location: New York City
Posts: 1,180
Thanks: 0
Thanked 1 Time in 1 Post
I have 5000 miles on my accord and there has been this weird DUHT DUHT DUHT sound and vibration when I press the brake and when I slightly release it. It seems to happen only for the first few minutes. After driving for awhile, the sound disappears. Can this be warped rotors? I had this problem for awhile...
__________________
[FONT="Tahoma"]Honda Accord LX-P I4 2008
Polished Metal Metallic Sedan
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Drive Accord Honda Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
The answer to the random question may be found under the Off Topic section of the forums and in the "Drive Accord Forums" category.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may post new threads
You may 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

Forum Jump


All times are GMT -8. The time now is 02:24 PM.




Powered by vBulletin® Copyright ©2000 - 2014, vBulletin Solutions, Inc.