F350 brake problems [Archive]

1943gpw

06-17-2007, 06:33 AM

I need help. I have 95 F350, 4wd, diesel. 80k
Front brakes calipers were not realeasing all the way, causing brake drag. I replaced them with new calipers/pads. When I went to road test, I found that when I apply brakes, the pedal gradually goes all the way to floor. I suspected master cylinder, and replaced that. Still does same thing. This only happens when the engine is running. With engine off, pedal holds firm, but when I start, it goes to the floor.

Does anyone suspect vacuum booster? Can they malfunction like this and allow the pedal to go to the floor?:confused::confused:


Pirate4x4.Com > Brand Specific Tech > Ford > F350 brake problems PDA : F350 brake problems 1943gpw 06-17-2007, 06:33 AM I need help. I have 95 F350, 4wd, diesel. 80k Front brakes calipers were not realeasing all the way, causing brake drag. I replaced them with new calipers/pads. When I went to road test, I found that when I apply brakes, the pedal gradually goes all the way to floor. I suspected master cylinder, and replaced that. Still does same thing. This only happens when the engine is running. With engine off, pedal holds firm, but when I start, it goes to the floor. Does anyone suspect vacuum booster? Can they malfunction like this and allow the pedal to go to the floor?:confused::confused: Offrhoder4x4 06-17-2007, 04:29 PM Sounds like you got a bad master cylinder out of the box. shooter 06-17-2007, 07:29 PM DO you have rear abs? The RABS valve is notorious for this.