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roy, import/domestic specialest
Category: Ford
Satisfied Customers: 5721
Experience:  ASE master tech for 40 years
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97 F250,7-3 diesel, new master cylinder, new vacumn booster,

Customer Question

97 F250,7-3 diesel, new master cylinder, new vacumn booster, acts like no power brakes,but has brakes, red brake light goes on and off, drive awhile red light stays off
Submitted: 1 year ago.
Category: Ford
Expert:  roy replied 1 year ago.

good evening my name is ***** ***** I will assist

it sounds like you have a failing vacuum pump. since a diesel produces no vacuum, an outside source has to be added. there is a vacuum pump that is belt driven that creates the needed vacuum for the accessories. it is a common failure for this problem.