Suspension and Brakes Springs, shocks, coilovers, sways, braces, brakes, etc.
Old 12-16-14, 11:57 AM
How-Tos on this Topic
Last edit by: IB Advertising
See related guides and technical advice from our community experts:

Browse all: Lexus IS Brake Guides
Print Wikipost

brake pedal randomly goes to floor?

Thread Tools
 
Search this Thread
 
Old 08-19-12, 05:07 PM
  #1  
89supra884
Driver School Candidate
Thread Starter
 
89supra884's Avatar
 
Join Date: Jul 2012
Location: il
Posts: 40
Likes: 0
Received 0 Likes on 0 Posts
Default brake pedal randomly goes to floor?

well all my fluids are good and no leaks. but randomly when i drive the brake pedal goes to the floor. when i pull off of it and pump its ok. anyone had this problem?
Old 08-19-12, 05:43 PM
  #2  
2JTsc300
Pole Position
 
2JTsc300's Avatar
 
Join Date: Oct 2011
Location: Texas
Posts: 275
Likes: 0
Received 2 Likes on 2 Posts
Default

are your rotors warped?
Old 08-19-12, 05:47 PM
  #3  
DaveGS4
Forum Administrator

iTrader: (2)
 
DaveGS4's Avatar
 
Join Date: Feb 2001
Location: North Carolina
Posts: 31,433
Received 2,128 Likes on 1,298 Posts
Default

Have you changed your brake fluid lately or work on your brake system? Did you bleed your brakes?
Old 08-19-12, 06:06 PM
  #4  
OG Dada
Lexus Champion
iTrader: (10)
 
OG Dada's Avatar
 
Join Date: Apr 2011
Location: CA
Posts: 3,118
Received 16 Likes on 12 Posts
Default

Gotta bleed your brakes and more likely flush the system if it's dirty....
Old 08-19-12, 10:41 PM
  #5  
Blkexcoupe
Lead Lap
iTrader: (8)
 
Blkexcoupe's Avatar
 
Join Date: Mar 2007
Location: California
Posts: 4,351
Received 551 Likes on 370 Posts
Default

If your brake pedal is dropping to the floor your master cylinder could be going bad.
Old 08-19-12, 11:19 PM
  #6  
OG Dada
Lexus Champion
iTrader: (10)
 
OG Dada's Avatar
 
Join Date: Apr 2011
Location: CA
Posts: 3,118
Received 16 Likes on 12 Posts
Default

^^^Not necessarily, but can be one of the reasons, or the brake booster hoses are busted or have leaks.
Old 08-20-12, 05:48 PM
  #7  
89supra884
Driver School Candidate
Thread Starter
 
89supra884's Avatar
 
Join Date: Jul 2012
Location: il
Posts: 40
Likes: 0
Received 0 Likes on 0 Posts
Default

ill deffiently try to bleed/flush the system. i have not done any work yet. i bought it 2 weeks ago and just trying to work out the kinks
Old 10-03-12, 09:43 PM
  #8  
phatbear79
Driver School Candidate
 
phatbear79's Avatar
 
Join Date: Jun 2012
Location: Florida
Posts: 9
Likes: 0
Received 0 Likes on 0 Posts
Default

im having the same problem. it looks like the master cylinder along with warped brake lines could be the culprit..
Old 10-04-12, 08:50 PM
  #9  
SEXC
Pole Position
iTrader: (2)
 
SEXC's Avatar
 
Join Date: Jan 2005
Location: California
Posts: 316
Likes: 0
Received 0 Likes on 0 Posts
Default

I recommend doing the brake flush first since it's cheaper and odds are it hasn't been performed in a while.
Old 10-05-12, 02:32 PM
  #10  
V8drummer
Intermediate
iTrader: (5)
 
V8drummer's Avatar
 
Join Date: Feb 2005
Location: WA
Posts: 499
Likes: 0
Received 1 Like on 1 Post
Default

I had the same thing happen to my old Chevy truck, it was the master cylinder going bad. Make sure and get it checked out soon!
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
SorrGwa
Suspension and Brakes
39
05-08-17 04:00 AM
Lexus082
Suspension and Brakes
2
06-21-11 05:39 PM
Avarec
SC- 1st Gen (1992-2000)
7
04-14-10 02:27 AM
gcam77
Suspension and Brakes
4
02-06-08 08:53 PM
jimbo22s
ES - 1st to 4th Gen (1990-2006)
3
07-26-04 07:04 PM



Quick Reply: brake pedal randomly goes to floor?



All times are GMT -7. The time now is 11:33 PM.