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Old 06-27-2012, 11:31 AM   #1 (permalink)
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Default Brake pedal hard to push down before starting car

Hello all,
I have the limited with the push start. In order to start the car, you have to push the brake in so far and then push the push button. Lately the brake pedal is really hard to push down after its been sitting for an extended period. Once its started, all is fine.

Any ideas? Im going to call them, I have a big road trip coming up in a bit, so I wanna get it looked at before that...but just checking with you guys.

Its almost like I've pumped it a few times first, but its not the case.
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Old 06-27-2012, 12:46 PM   #2 (permalink)
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You should only need to toe the pedal enough to close the brake light circuit,, not literally stand on the pedal to hold brakes firmly..

Stored vacuum over time has faded away, hence the firm pedal.. starting the engine creates vacuum for the booster assist, thus pedal feel soft... carry on, nothing to do for that. ---> shut engine off, push brake pedal a few times to dump stored vacuum.. now with firm pedal, apply toe pressure to pedal, and start engine while still riding pedal,, feel pedal sink/move freely with engine running,, manifold vacuum provides for assist.
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Last edited by sbr711; 06-27-2012 at 12:49 PM.
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Old 06-27-2012, 03:55 PM   #3 (permalink)
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Seems normal. As SBR said, the brakes are powered with engine vacuum. If the engine hasn't been running, there isn't any vacuum left, so the brakes aren't powered.
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Old 06-27-2012, 11:08 PM   #4 (permalink)
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sbr711 its nice to have your technical expertise around here. Thanks for taking the time to provide a thorough answer to simple questions like this.
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Old 06-27-2012, 11:17 PM   #5 (permalink)
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Quote:
Originally Posted by someguy View Post
sbr711 its nice to have your technical expertise around here. Thanks for taking the time to provide a thorough answer to simple questions like this.
+1 to that comment. sbr711 never ceases to amaze me.
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Old 06-28-2012, 03:01 AM   #6 (permalink)
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We've had this problem several times on our Sonata limited. We finally took it in and it was a known issue and seemly an easy fix for the shop. I'm not sure if the elantra is the same, bit if you hold down the start button for 15-20 seconds while the cars accessories are on, it will override the brake switch and start the car. The pedal will go back to normal and you'll be on your way. It happened 6 times or so before we took it in. Did a little looking around and found the override. Works every time... assume it would be the same on the elantra limited as well. hope this helps.
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Old 06-28-2012, 05:15 AM   #7 (permalink)
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Quote:
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sbr711 its nice to have your technical expertise around here. Thanks for taking the time to provide a thorough answer to simple questions like this.
+1 How many people he has helped will never be known.
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Old 06-28-2012, 02:04 PM   #8 (permalink)
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Holy cow Spiffy, I was able to bypass the brake pedal altogether with little trick. Now I know I can start the car a different way should I not/can't depress the brake pedal. Thanks!!
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Old 06-28-2012, 05:52 PM   #9 (permalink)
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Quote:
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Holy cow Spiffy, I was able to bypass the brake pedal altogether with little trick. Now I know I can start the car a different way should I not/can't depress the brake pedal. Thanks!!
No problem. Glad I could help! That issue you have can also cause the traction light to come on randomly. If it becomes amore common problem, take it in and they will replace the switch for you under warraty.
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Old 06-28-2012, 10:27 PM   #10 (permalink)
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hmm.. on my elantra, sometimes i can only push the brake a little bit but other times i can push it all the way down to start the car.
I have the limited with push button to start.
is it normal?
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