THIS TRUCK IS A 6

2008 Ford F-250

Tiny

rlewis1945

October, 16, 2012 AT 7:10 PM

This truck is a 6.4L diesel with hydro-boost brakes. The power steering works fine. If I hit the brakes it stops fine. However, if the brake pedal is pushed down hard the pedal will gradually sink to the floor. With the key off the pedal never sinks to the floor. If I hold the pedal down hard and start the motor the pedal drops right to the floor. What's wrong?

FOUND 2058 RELATED QUESTIONS

1 Answer

Tiny

hmac300

October, 16, 2012 AT 7:53 PM

Soundslike the master cylinder is bad or air in system.

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Brake Master Cylinder Replacement Like a Pro