Her brake pedal goes basically to the floor when you press it

2003 KIA SPECTRA

70,000 MILES • 4 CYL • FWD • AUTOMATIC

PETEEHOWARD

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I drove my girlfriends car last week for the 1st time in about 4 months. Her brake pedal goes basically to the floor when you press it. I have checked the pads in the front and shoes in the rear. They were all in good shape along with the calipers and wheel cylinders. I have bleed the system twice times. When that did nothing i changed the master cylinder. Bleed the system twice again and still nothing. i have run out of ideas. please help.

Sep 29, 2009 at 11:44 PM

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SQM

CAR REPAIR CONTRIBUTOR
6,383 POSTS

Hello,

There are few reasons of why the brake pedal goes to the floor.
It could be due to air in the brake lines, bad master cylinder, leak in the brake system, low on fluid.

https://www.2carpros.com/articles/brake-pedal-goes-to-the-floor

Be sure to check for any leaks from the calipers or any of the lines/hoses.
Keep in mind that if the brake bleeding not done as per the recommended process, you might not be able to get all the air out.
Also, if this vehicle is equipped with ABS the bleed procedure is little different.

https://www.2carpros.com/articles/how-to-bleed-or-flush-a-car-brake-system

I have attached diagrams for both ABS and non-ABS brake system.

Please let me know if you have any questions.
Thank you.

Images (Click to enlarge)

Oct 21, 2021 at 8:26 PM