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No brakes after replacing Master cylinder

Tiny
CHRISTIAN GETZ
  • MEMBER
  • 1994 MERCURY VILLAGER
  • AUTOMATIC
  • 190,000 MILES
Had this van in the shop for three weeks now and I have never had such a problem. Replaced master cylinder along with all new hoses and bled countless times and still no brakes. I can pump the brake six or seven times and get pressure, but it slowly fades out. Someone please explain to me what I am doing wrong or what is happening? Thanks.
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Wednesday, February 1st, 2017 AT 8:32 AM

3 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
If the vehicle has an ABS system you have air in the ABS part and will need a scanner to open the ABS valves and bleed the system that way. It takes a specialized scanner that most pros have.
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Wednesday, February 1st, 2017 AT 9:33 AM
Tiny
CHRISTIAN GETZ
  • MEMBER
  • 2 POSTS
I will try that next and let you know. Thank you!
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Wednesday, February 1st, 2017 AT 9:35 AM
Tiny
CJ MEDEVAC
  • MECHANIC
  • 11,004 POSTS
HMAC 300 might have the right answer.

I'm just giving you another possibility.

Could be your bleeding technique?

Before you spend $$$ look over the way I bleed the master cylinder and the brakes.

See my link,

https://www.2carpros.com/questions/1998-ford-f-150-cant-get-brakes-bleed

Return with good news!

The Medic

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Wednesday, February 1st, 2017 AT 6:02 PM

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