Question about 1995 Ford F250

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95 ford f250 powerstroke brake pedal will go down by itself and or stick once its pressed changed and bench bled master cylinder twice changed power booster (maybe got a bad booster?) or could the vacuum pump be producing to much vacuum

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  • Ford Master
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You must inspect ALL Brake lines, flexible and steel, and each corner brake. Look for fluid leaks. If everything below is okay, replace the M/C. I suspect damaged cup or bore. do not rebuild, get a new one. Unlikely too much vacuum.

Posted on Sep 06, 2010

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1 Answer

Master cylinder


The master cylinder is mounted on power brake unit (the big black round canister) on firewall held down with 2 12mm nuts depending on braking system usually 2 10mm brake lines need to be removed on out it comes. Bench bleed new master cylinder before install . Fill reservoir with brake fluid and slowly push piston about 1 inch back and fore until air is gone ( assuming mater comes with bench bleed kit ) then install and repeat with someone pressing on pedal lock line closed before pedal is released again EG pump pedal ok hold it (open line watch fluid come out close) ok let up pump it up again repeat may be twice per line. the pedal should be firm once done.

May 03, 2014 | Acura Integra Cars & Trucks

1 Answer

1995 ford powerstroke replaced rear brake pads,hardware, drums, and master cylinder after much bleeding it stops but at standstill with brake pedal pressed the pedal begins to drop


OK, did you bench bleed the master cylinder before installing? If not, the warranty will be void, and the pedal will drop even if the rest of the hydraulic system is sealed.
I would try another new master cylinder if the bench bleeding was not performed and the master cylinder was deemed to be damaged.

If the master cylinder was bench bled, and it does this, maybe you can get it replaced with a new one under warranty.

Good luck on this repair.

Nov 06, 2011 | 1995 Ford F350

1 Answer

I HAVE A 95 F250 AND THE BRAKE PEDAL GOES TO THE FLOOR. I HAVE REPLACED THE MASTER CYLINDER TWICE AFTER BENCH BLEEDING, REPLACED THE BRAKE BOOSTER . BLED THE SYSTEM 3 TIMES AND THE BRAKE PEDAL STILL GOES...


You need to check wheel cylinders, the only way that the brake peddle will go to the floor like that is if there is a lose of fluid pressure somewhere .

Dec 29, 2010 | Ford F-250 Cars & Trucks

1 Answer

I have a 1999 ford f250 powerstroke 6 speed manual. When I go to start the truck I can push the clutch all the way down. For some reason the plunger behind the clutch won't go in. Do I have a serious or...


Have never heard of this problem, so it is interesting. Unless there is something blocking the pedal, I can only guess that the piston has come apart in the master cylinder. To verify it is the master cylinder, go to the clutch and open the bleeder valve and have someone in the car see if the clutch will go all the way down. Use something to catch the fluid, as brake fluid is corrosive. Close the bleeder before your assistant lets up on the pedal.
If the pedal went all the way down, the problem is at the clutch.
If the pedal didn't go all the way down, remove the master cylinder.
While removing, check for any issues with the linkage.
If no linkage issues, replace the master cylinder.
The part is $50 at autozone. Labor is about an hour.
Make sure to bench bleed the master cylinder before reinstallation.
If you need instructions or have more questions, please let me know.
I'm interested to hear what you find out.

Thanks for using FixYa

Dec 18, 2010 | Ford F-250 Super Duty Cars & Trucks

3 Answers

No brakes push pedal to floor


leaky rear break cylinder or master cylinder

Oct 02, 2009 | 2001 Chevrolet Blazer

3 Answers

Just replaced master cylinder on 1990 aerostar and bled the brakes, still the pedal goes to floor and i have no brakes


Did you bench bleed the master cyl. before installing it? then when you installed the new master, did you bleed all 4 points? If yes, then check all for points for leaking caliper/s and leaking wheel cylinder/s. If the van has ABS, check the valve body for a bleeder screw and see if air bleeds out of it. If you've checked everything twice and did everything right then your new master cyl. may be defective.

Apr 29, 2009 | 1986 Ford F 250

2 Answers

2005 f150 spongy brakes


possibly new master cylinder is defective

Mar 24, 2009 | 2005 Ford F-150

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