GX - 1st Gen (2004-2009) Discussion topics related to the 2003 -2009 GX470 models

brake power fluctuation.

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Old 03-22-14, 10:13 AM
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varithms
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Default brake power fluctuation.

The brakes surge with more power when the brake petal is held at a constant pressure. My guess it has to do with the brake booster. But normally a failing booster would result in less braking ability not more.
Old 03-22-14, 11:02 AM
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mrblister
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Originally Posted by varithms
The brakes surge with more power when the brake petal is held at a constant pressure. My guess it has to do with the brake booster. But normally a failing booster would result in less braking ability not more.
When you say the brakes surge with more power what exactly do you mean. On my truck when I am sitting at a light and my air cond compressor cycles the idle speed increases and I feel a surge
in my brakes based on the increase in idle speed. By that I mean I can feel the truck wanting to move forward and the brake pressure does increase.
Old 03-24-14, 03:53 AM
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varithms
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Originally Posted by mrblister
When you say the brakes surge with more power what exactly do you mean. On my truck when I am sitting at a light and my air cond compressor cycles the idle speed increases and I feel a surge
in my brakes based on the increase in idle speed. By that I mean I can feel the truck wanting to move forward and the brake pressure does increase.
It is like pushing on the brake pedal real hard but I'm not. It throws everyone in the car forward.
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