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1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

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Old 03-01-2009, 11:32 AM
BNeu11383 BNeu11383 is offline
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Cool Brake pedal goes to floor

You guys are my last hope so here goes. 1993 F150 4x4. The truck has a hard brake pedal till i start it up and then i goes straight to the floor. The Problem Started out as a hanging caliper. Replaced pads and away i went. Half way home my pedal went right to the floor. Bled the brakes and not any better. So bought a Master cylinder and bench bled it, put back in and no better. Said hell it started with a hanging up caliper so ill replace them and the hoses that go to them. Did that and rebled and still no better. Figured the master i got must have been bad so got another one. No better. Bought a booster and still no better. All the lines on the truck have been replaced but 2 and theres no leaking. I have bled the proportion valve and abs valve. I'm at a loss. Everyone i talk to has no answers.

Any Ideas would be great.

oh If i push the pedal to the floor while driving i can get the right rear to lock up but that is it.
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Old 03-01-2009, 02:10 PM
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try sending a p.m. to "andym".

go to:

http://www.ford-trucks.com/forums/me....php?do=getall

then put in california for state and over to the right type in "andym"

in that list he is 3rd or 4th.
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Old 03-01-2009, 02:39 PM
Lazy K Lazy K is offline
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Quote:
Originally Posted by BNeu11383 View Post
You guys are my last hope so here goes. 1993 F150 4x4. The truck has a hard brake pedal till i start it up and then i goes straight to the floor. The Problem Started out as a hanging caliper. Replaced pads and away i went. Half way home my pedal went right to the floor. Bled the brakes and not any better. So bought a Master cylinder and bench bled it, put back in and no better. Said hell it started with a hanging up caliper so ill replace them and the hoses that go to them. Did that and rebled and still no better. Figured the master i got must have been bad so got another one. No better. Bought a booster and still no better. All the lines on the truck have been replaced but 2 and theres no leaking. I have bled the proportion valve and abs valve. I'm at a loss. Everyone i talk to has no answers.

Any Ideas would be great.

oh If i push the pedal to the floor while driving i can get the right rear to lock up but that is it. :-hair
I would guess the first time it happened you had a master cylinder failure. I would further say that the problem now is the system is full of air. I would make sure the rear brakes are fully adjusted up and then bleed the brakes again.
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Old 12-12-2011, 05:31 PM
workdad workdad is offline
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I'll be watching

I'm having the same problem with my 95 250 PS. I haven't changed the booster or vacuum pump yet. I was going to change calipers, but maybe not now. Mine started with a stuck caliper as well. Got it unstuck and put new pads and it hasn't been the same since. Put in new master cylinder as well. Bled the thing at least 3 times. Same exact problem, but my pedal is a little soft with engine not running.
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Old 12-12-2011, 05:53 PM
workdad workdad is offline
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I guess I'll check on adjusting/replacing rear brakes. My Chilton Cd says there's a sensor, and the rear have to engage good before front will at all.
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Old 12-12-2011, 06:06 PM
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Don't forget to bleed the RABS valve on the frame under the drivers feet.. Since you replaced the master cylinder there is a good chance it has air in it..
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Old 12-12-2011, 06:06 PM
 
 
 
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