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jp467 06-10-2011 04:50 PM

Brake pedal question
I have noticed on my Overland that if I let it sit for two days or longer without being started when I get in to start it the brake pedal is hard as a rock until I start the engine. It will not do it just sitting one day. I know this means the Vacuum is bleeding off over that time. Just wondering if anyone else has noticed this?

JayB 06-10-2011 04:53 PM

Re: Brake pedal question
I've noticed the same thing lately. Haven't asked about it yet.
Laredo X 3.6L 4x4

ENFORCER 06-10-2011 07:04 PM

Re: Brake pedal question
You need to remember that the new ABS/FCW/Stability control can activate the brakes, so they are not like the old school systems. I would expect that it is normal operation and not worth a consern.

mjw930 06-11-2011 08:21 AM

Re: Brake pedal question
Mine does it too, I assume it's a byproduct of the design and nothing to worry about.

Benzie002 05-03-2012 07:11 PM

Re: Brake pedal question
Hi, Mine just started doing this too and it just turned a year old. Never did it before until a couple of days ago. Even sitting overnight. I will bring it up on my next dealer visit.

Aiyer 05-03-2012 09:22 PM

Re: Brake pedal question
My old Jeep did that too... if the engine is not running, brakes do not work. So, I think it is normal (being power brakes? idk)

77Cherokee 05-05-2012 06:34 PM

Re: Brake pedal question
Mine does it. I'm sure it is by design and don't consider it a problem.

2005JGC 05-06-2012 02:25 AM

Re: Brake pedal question
I have not had to perform a booster test on a wk2 but all you really need to be worried about is that you have 3 or so decent assisted pumps after you shut it off before it gets hard...

A way you can test normal operation yourself:

run the engine up to 1500 rpms for a couple seconds, lift your foot off the accelerator pedal, turn the engine off. wait 90 seconds then apply the brakes, you want at least 2 assisted pumps before it gets hard... IF you have 2 there is NOTHING wrong and a trip to the dealer will just tell you what I just told you. The system is not designed for retaining vacuum for nights or days, while it is designed to retain vacuum which in some systems may hold for days, this one does not, doesnt mean anything is wrong, just how it is.

Benzie002 09-14-2012 01:10 PM

Re: Brake pedal question
I have mine being looked at by dealer. If they find anything I will post.

Benzie002 09-17-2012 08:27 AM

Re: Brake pedal question
Dealer claims this is normal, but the car is a year and a half Old and it just started happening a few months ago???

bilex 09-23-2012 05:09 PM

Re: Brake pedal question
I have the same thing.... sometimes...
It seems that there is no rule: one night, two nights... It really doesn't matter.
I think maybe it is a question of humidity or outside temperature?
Don't know... but when I start the engine everything is back to normal so I kind of got used to it.

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