Mazda CX-5 The CX-5 CUV debuts Mazda's SKYACTIV® TECHNOLOGY and is unique for its impressive fuel economy, responsive handling and bold style

Battery and break problems

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Old 05-10-2013, 10:39 AM
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Join Date: Nov 2012
Posts: 42
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Originally Posted by beckyvoss View Post
The purchasing dealer put a brand new battery in it. Hopefully it helps. I have had it back a week now with no problems. I have noticed I am getting 2 mpg's better now with the same type of driving. They stated due to the vacuum process the brake pedal will sometimes not move before starting. We'll see.
Hopefully that will take care of it. The brake booster needs vacuum from the engine to operate. Here's a good overview of what it does:
HowStuffWorks "How Power Brakes Work"

Hopefully they looked at the check valve that is supposed to hold vacuum in the booster when the engine is off.
 
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