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Brakes are odd.

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Old Sep 11, 2013 | 02:28 AM
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Default Brakes are odd.

I push on my brakes and then let off and immediately push again the pedal goes down further? What could that be.
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Old Sep 11, 2013 | 11:57 AM
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Air? check entire truck front to back top to bottom for leaks, make sure reservoir is full, try bleeding them.
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Old Sep 11, 2013 | 03:46 PM
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OK I will try that. Thank you.
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Old Sep 11, 2013 | 04:04 PM
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Could also be a bad master cylinder.
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Old Sep 12, 2013 | 07:47 PM
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it is caused by a lack of vacuum in the booster. I bet it does it when the truck is at idle when there is low vacuum on the motor, rev the truck up while doing it. see if it still does it.
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Old Sep 12, 2013 | 07:52 PM
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I thought vac was at the highest at idle.
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Old Sep 12, 2013 | 08:50 PM
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sorry, i phrased that wrong, at idle there is good vacuum, but at high engine rpms, with the throttle closed is the highest vacuum.
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