Brake pedal go all the to the floor after replacing spark plugs and coil pack

225,000 MILES • 3.8L • 6 CYL • 2WD • AUTOMATIC
Avatar
SNEAKYMITTENS
  • MEMBER
  • 1 POST
Brakes were working perfectly. Had to have spark plugs and coil pack replaced, and now the brakes go all the way to the floor (and even then they sometimes will not stop the car). Brake fluid is holding well. There was a time when the mechanic was checking my engine mounts by holding the brake tight and accelerating. Could it just be that the pedal needs time to reset after that type of use?
May 16, 2018 at 2:54 AM
Avatar
ASEMASTER6371
  • ✓Experienced Mechanic
  • 52,796 POSTS
Good afternoon.

There is no reset on the brake pedal.

When the tech did the test and pressed hard on the pedal to keep it from moving, the seals got damaged in the master cylinder. The master cylinder needs to be replaced.

Roy

https://www.2carpros.com/articles/how-to-replace-a-brake-master-cylinder
Mar 15, 2021 at 5:47 AM
Add a reply
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.

Frequently Asked Problems for This Vehicle