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idle bounces up when i press brake. please help!

 
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Old 01-08-2012, 04:44 PM
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idle bounces up when i press brake. please help!

well this has been happening for a while but i cant seem to find out what it is. problem is when go to brake while driving as i press the brake the idle bounces up when it hits 1000 rpm and then again about 100 rpm up when i come to stop. what do you guys think is causing this?
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Old 01-09-2012, 02:07 AM
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Re: idle bounces up when i press brake. please help!

wow nobody has anything, hmmm.
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Old 01-09-2012, 10:51 AM
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Re: idle bounces up when i press brake. please help!

the FINAL idle problem thread!!!!!


prolly a vacuum leak in either the brake booster, or the vac lines going to/from the BB.
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Old 01-09-2012, 01:51 PM
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Re: idle bounces up when i press brake. please help!

is your lude an automatic?
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Old 01-09-2012, 06:11 PM
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Re: idle bounces up when i press brake. please help!

Yeah its an automatic, well atleast for the next month it is., swap coming in febuary
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Old 01-10-2012, 12:55 PM
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Re: idle bounces up when i press brake. please help!

i'm willing to bet you when you do that swap the problem will stop... what i mean is, it's normal for automatics to do that. it's the torque converter lock disengaging. i know it's normal because mine did it the day my dad drove it off the show room floor. just to be sure though, since you say it does it only when you're hitting the breaks, with the engine warmed up, take your car up to about 50mph. let the torque lock engage (holding steady at 50 for just a few seconds) let off the gas and don't even touch the break. when you get to about 40ish, the rpms should do that with out hitting the break. you'll also feel a difference in your deceleration rate since the engine no longer has a direct connection to the tranny/wheels.

as for it doing it when you come to a stop, it's the tranny downshifting from 3rd to 1st. it more or less skips 2nd when you're coming to a stop.
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Drew can be a bigger asshole than me, and tell them in 16353 ways that they're a moron for wasting his time, and still not answer them.
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Last edited by Beaker; 01-10-2012 at 12:59 PM.
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Old 01-11-2012, 02:33 AM
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Re: idle bounces up when i press brake. please help!

On the money bro thata exactly what it does, lol so I guess although annoying as hell its normal, now I really cant wait for the swap.
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Old 01-12-2012, 01:21 PM
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Re: idle bounces up when i press brake. please help!

I second Beaker's diagnosis.
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