IS - 2nd Gen (2006-2013) Discussion about the 2006+ model IS models

Strange braking problem

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Old 01-25-18, 05:44 PM
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chucktaylu
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Default Strange braking problem

I just purchased this is IS250 awd. The previous owner said he had the brakes done about a month ago and noticed this issue too. Whenever I step on the brake, I feel tapping feedback on my foot. Similar to when ABS is active. However, this happens every time I brake. Not matter how slow Im going or how soft I am on the pedal, the feedback occurs. Previous owner said this didnt happen until the pad and rotor change. The pedal feels normal, not too soft not to stiff. I dont have to depress it an abnormal amount to stop. The car stops when I want it to. The only issue is the feedback. Any ideas?
Old 01-25-18, 06:42 PM
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flowrider
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Sounds like the rotors (or one of the rotors) may have high spots causing your pulsating feel. Have the rotor/pad combo ever been bedded in?

Lou
Old 01-25-18, 06:55 PM
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chucktaylu
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Originally Posted by flowrider
Sounds like the rotors (or one of the rotors) may have high spots causing your pulsating feel. Have the rotor/pad combo ever been bedded in?

Lou
The pads and rotors are only about a month old. Should I give it some time to bed before I bring it to a shop?
Old 01-25-18, 09:05 PM
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^^^^You didn't answer my question

Lou
Old 01-26-18, 05:18 AM
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jr4div2
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Originally Posted by flowrider
^^^^You didn't answer my question

Lou
Yes, he did, Lou...sort of. By his response he doesn't know what is meant by bedding in the pads.
Old 01-26-18, 06:33 AM
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chucktaylu
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Originally Posted by jr4div2
Yes, he did, Lou...sort of. By his response he doesn't know what is meant by bedding in the pads.
Sorry, I thought bedding just meant driving them for a certain period of time. I guess the answer is no? Nothing special was done, only drove on them for over a month.
Old 01-26-18, 07:54 AM
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flowrider
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^^^^Try bedding them in, there may be high spots left by pad material adhering to the rotor, bedding should remove it.

Lou
Old 01-26-18, 09:55 AM
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cartman57
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Originally Posted by chucktaylu
Sorry, I thought bedding just meant driving them for a certain period of time. I guess the answer is no? Nothing special was done, only drove on them for over a month.

Some info on proper pad bedding after installation.
http://brakeperformance.com/bedding-in-rotors.php
Old 01-26-18, 10:32 AM
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Gville350
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Was the proper brake hardware (clips, etc) re-used or new hardware used during the install of the new pads/new rotors.
Old 01-26-18, 07:32 PM
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chucktaylu
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Thanks for all the help. It turns out the previous owner didnt change all the brakes, only the rears. I took it to a mechanic and he said the front rotors were warped. I changed them out and everything is normal now.
Old 01-26-18, 07:47 PM
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^^^^Rotors don't warp, but as I said, they can develop high spots from the transfer of pad material. Glad it worked out for you.

Lou
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