Weird Problem with brakes when stopping at light
#1
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Weird Problem with brakes when stopping at light
Hello every1.
so here is my problem: Almost all the time when i am stopped at a red light for a more then 30 seconds , I feel a knocking on my brake pedal. Any1 has an idea of what this issue might be. Then when i putt it to neutral ( most times when stopped i have this habit of putting car on neutral) knocking goes away.
thank you for all your knowledge and replies
so here is my problem: Almost all the time when i am stopped at a red light for a more then 30 seconds , I feel a knocking on my brake pedal. Any1 has an idea of what this issue might be. Then when i putt it to neutral ( most times when stopped i have this habit of putting car on neutral) knocking goes away.
thank you for all your knowledge and replies
Last edited by naser075; 10-12-2010 at 08:09 AM.
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#4
Chapter Leader (Southern Region)
Are your windshield wipers on?
If putting it in neutral does make the "knocking" go away then the most likely culprit is your rear motor mount.
If putting it in neutral does make the "knocking" go away then the most likely culprit is your rear motor mount.
#5
Middle Finger anyone?
iTrader: (9)
If it was moving I would say that it was an ABS problem. But since it is sitting still my insticts suggest a hydraulic problem. You might want to get your brake booster checked out. I googled it and I found this little blurp...
http://answers.yahoo.com/question/in...4011450AAsjNws
http://answers.yahoo.com/question/in...4011450AAsjNws
#6
Chapter Leader (Southern Region)
If it's brake booster related and if stopping efficiency hasn't changed than more than likely it's on the intake side. Might want to clean up the throttle body and possibly deep creep / seafoam the booster line.
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i appreciate all your helps .
one guy ; Are your windshield wipers on? no they are not but sometimes when it rains and they are on i feel them knocking in the pedal as well.
so guys what do i do to fix this issue bring it to stealer or locale mec. or is it somehting i can fix muyself am sure it is brake booster at this point
one guy ; Are your windshield wipers on? no they are not but sometimes when it rains and they are on i feel them knocking in the pedal as well.
so guys what do i do to fix this issue bring it to stealer or locale mec. or is it somehting i can fix muyself am sure it is brake booster at this point
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#8
Chapter Leader (Southern Region)
You can seafoam the booster line yourself.
#10
Team Owner
Does the pedal move at all when you feel the knocking? Is it a constant knock or random? When AC compressor kicks off, more vaccum is sent to the booster and the pedal will sink just a little along with a very slight knock.
I agree with others, check the mounts first.
I agree with others, check the mounts first.
#11
Team Owner
Usually booster testing involves testing with the engine off and how long it will hold vacuum, assuming pedal pressure is normal.
#12
I am guessing you have a AT. I had a very similar issue with a 95 Intrepid. It was the torque converter. The torque converter is still trying to push you forward even though your foot is on the brake, it stops when you are in neutral because the trans is no longer engaged. Number one thing to do is check the trans fluid level. If it is OK take it to a tans shop and have them check it out. PS the Intrepid when another 6000Km after that, and then the trans locked up. Thankfully I sold it before the lock up.
#14
on that ck valve in the booster line--iirc you can remove that and deep creep/seafoam it
if its not working
but dont do a seafoam engine vac port treatment thru the booster line, due to that ck valve
Use TB master vac port, or thru tb throat itself with deep creep aerosol
IHC can you verify that?
if its not working
but dont do a seafoam engine vac port treatment thru the booster line, due to that ck valve
Use TB master vac port, or thru tb throat itself with deep creep aerosol
IHC can you verify that?
#15
broken front/rear motor mounts that are vac assisted will cause other vac related problems
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So i tried all the above and non of them are making fault and the freaken brake pedal heartbeat thing seems to have gone away. One strange thing though when i turn the winshield washers on i get that heartbeat thing to what causes that .....
#19
Chapter Leader (Southern Region)
Just vibration from the wipers down the firewall to the pedal. I believe there's a tsb for it somewhere in the garage. I just learned to live with it.
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