Hard break peddle

PUMAFIDE

MEMBER
2001 MERCURY SABLE
6 CYL
2WD
AUTOMATIC
150,000 MILES

The car will stop at times but, the pedal will get hard and it will wistel.I looked at the calipers, air valve and pads. Could it be the booster, master cylinder or the pump?

Tuesday, December 14th, 2010 AT 6:58 AM

4 Replies

JIS001

MECHANIC
3,411 POSTS

Yes, it sounds like your brake booster is starting to fail.

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Tuesday, December 14th, 2010 AT 7:02 AM

PUMAFIDE

MEMBER
2 POSTS

Thanks man!Your a life saver!

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Tuesday, December 14th, 2010 AT 8:11 AM

JACOBANDNICKOLAS

MECHANIC
109,709 POSTS

Before replacing the booster, check to make sure the vacuum hose to it is not damaged, dry rotted, cracked, or loose. Also, I recommend have a vacuum test done on it to see if can maintain vacuum. If it doesn't hold, replace it. If it does hold vacuum, then it is time to look other places.

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Wednesday, December 15th, 2010 AT 4:25 PM

GOODFELLAS1957

MEMBER
35 POSTS

On a reguler brake system this would indercate a vac leak to the booster if it had a vac booster ford had a hydrulic power boost assist but you have a 2001 merc this car should have come with abs (anti lock system) your broblem might be in the abs unit.

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Wednesday, December 15th, 2010 AT 4:35 PM