Brakes
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Freshman User
Joined: Feb 2014
Posts: 41
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Brakes
At first I had no brakes in my 93 f250... I litterly had to lift my but out of the seat and put all my wait on the pedal to stop... I changed the booster. Got a little better. Changed the master cylinder.. Still hard to stop. I don't know what the deal is
Elder User
Joined: Feb 2008
Posts: 867
Likes: 3
From: North Bend
Pull the hose out of the booster and check the vacuum on it while the engine is running. I can't remember what our trucks pull stock but it's around 20-21in, I believe.
Based on what you described, the pedal isn't bottoming-out, its just really hard to press, right?
That's the only things I know of that cause a hard pedal, is bad booster or no vacuum.
-Joshua
Based on what you described, the pedal isn't bottoming-out, its just really hard to press, right?
That's the only things I know of that cause a hard pedal, is bad booster or no vacuum.
-Joshua
Cargo Master
Joined: Oct 2012
Posts: 3,072
Likes: 48
From: California
if your climate control works and your tranny shifts, then you probably have a vacuum hose problem isolated to the lines for the brakes assist. If your brakes, climate control, and tranny shifting all don't work, then your vac pump is probably shot.
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Logistics Pro
Joined: Sep 2007
Posts: 3,737
Likes: 179
From: Western Mass
Put a vacuum gauge in the system and see what you get.
I think you'd want it near the booster, and monitor what happens not just at idle, but when you hit the pedal what happens, and how fast to recover.
Also check the vacuum reservoir. Its the thing that looks like a coffee can mounted on the drivers side fender
I think you'd want it near the booster, and monitor what happens not just at idle, but when you hit the pedal what happens, and how fast to recover.
Also check the vacuum reservoir. Its the thing that looks like a coffee can mounted on the drivers side fender
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Senior User
Joined: Jun 2010
Posts: 235
Likes: 1
From: Balt. Co, MD
I bought a vacuum gauge from Advance for like $25 the other day for some transmission stuff. You might need an adapter of some sort, but it should be pretty straight forward to test it on your own.
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