brake problem - Ford Powerstroke Diesel Forum
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Old 01-29-2013, 10:28 AM
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brake problem

So this just started out of nowhere. First driving g brake seem fine when I apply them it get real hard and I almost have to pulsate to get it to slow down a d slow speed scared if I have to panic stop I tried bleed the brakes and same thing I have no clue any hints or idea to help thanks oh and it is a standard cab manual transmission thanks again
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Old 01-29-2013, 11:30 AM
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Hard brakes go to bad vacuum system or bad diaphragm in the booster. With the motor running pull off the soft line to the booster and see if there is a good suction sound. Then put your thumb over it and see if it has good neg. pressure. if it does then go to the booster. If it doesn't go backward from the booster line to the vacuum block on the fire wall and pull the large line that goes to the vacuum pump on the front of the motor do the same test as above.
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Old 01-29-2013, 12:15 PM
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brake problem

Just got done fixing this problem. It was my vacuum pump. Second time I changed mine past couple years. Those are the exact symptoms I had. Fixed instantly. As long as your pedal eventually come back up and doesn't stay stuck to the it's likely not the booster. Let me know if you need any help. Got mine off eBay for $30. Expected it to last for few thousand. I barely drive it so don't care but still going strong! The expensive one went too, so I figured might as well do the cheaper one if the expensive one fails every few years.


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