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Car slow to pull off after an emergency stop
2010 Nissan Sentra

Car slow to pull off after an emergency stop

(2010 Nissan Sentra)
When I have to brake very hard, ie an emergency stop, think kid ran out in front of you type of stop. Once stopped, then starting off again, I have very poor acceleration for approx 30 seconds. Does the ABS lock the brakes so hard that it takes a while to get the pads moved away from the rotors, or can this be due to something else?

The car has approx 47K miles, is mainly driven on short journeys, work to home is approx 4 miles, and is a 2010 model 2.0s
How long have you had this problem? since I purchased the car
Tags: nissan, sentra
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1 answer & 1 comment
Popular Answer
on November 10, 2017
Hello,
The brakes should not be completely locked, and that is a function of the anti-lock braking system.

If the engine feels powerful, but the brakes are not releasing the wheels, this may be a failed brake master cylinder or brake booster.

With the vehicle off the ground, transmission in park or N, and engine running, press the brakes in the same manner. Then, within 30 seconds, get out and try to rotate the tires with the parking brake off.

That will let you know if your calipers are holding the wheels after hard braking.
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on November 10, 2017
Hi Casey, thanks for your response, I will give this a try when my wife and I next have the same day off.

If the brake master cylinder or brake booster had failed, would the car not be very hard to stop under normal driving situations, and especially under emergency braking situations?

The way I understand brakes, is that when you apply the brake, the calipers force the pads into the rotor on the front or drum on the back, when you remove your foot of the brake pedal, they still remain in this condition as no force has pushed the calipers back.

When you apply the accelerator, the small imperfections in the rotor or drum move the pads or shoes out and that creates a gap, so the brakes are no longer locking up the wheels.

I will try the brake test, it should still be locked, pity I can't also do an emergency brake in the same test.
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on November 10, 2017
Hello,
The brakes should not be completely locked, and that is a function of the anti-lock braking system.

If the engine feels powerful, but the brakes are not releasing the wheels, this may be a failed brake master cylinder or brake booster.

With the vehicle off the ground, transmission in park or N, and engine running, press the brakes in the same manner. Then, within 30 seconds, get out and try to rotate the tires with the parking brake off.

That will let you know if your calipers are holding the wheels after hard braking.
Sign in to reply
on November 10, 2017
Hi Casey, thanks for your response, I will give this a try when my wife and I next have the same day off.

If the brake master cylinder or brake booster had failed, would the car not be very hard to stop under normal driving situations, and especially under emergency braking situations?

The way I understand brakes, is that when you apply the brake, the calipers force the pads into the rotor on the front or drum on the back, when you remove your foot of the brake pedal, they still remain in this condition as no force has pushed the calipers back.

When you apply the accelerator, the small imperfections in the rotor or drum move the pads or shoes out and that creates a gap, so the brakes are no longer locking up the wheels.

I will try the brake test, it should still be locked, pity I can't also do an emergency brake in the same test.

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