A Braking Issue!!
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More Turbo
Joined: Feb 2004
Posts: 509
Likes: 3
From: Findlay, Il
A Braking Issue!!
On my '99 F350 2WD SRW. If I push the brake pedal down fast and with force, I have good brakes. If I just push down so so, the pedal may catch while still plenty of brake pedal, but with light foot press on the pedal, the pedal will release and continue to move downward to within one inch of the floor. This is kind of scary as the truck starts to roll forward again! My first thought was a bad power booster, but changed this out with no major improvement. Then I thought that I may have air in the lines so I bleed the brake lines. Still not working right. Now what??
Post Fiend
Joined: May 2009
Posts: 5,470
Likes: 3
From: Pea Ridge, AR
Is it a diesel? Only reason I ask is that the diesels have a Hydraboost system using hydraulic fluid and pressure from the power steering pump to boost the braking system? How is the level in the Power Steering resevoir? And is the cap on the brake fluid resevoir snuggly?
Molon Labe
Joined: Dec 2006
Posts: 5,272
Likes: 1
From: Alaska
On my '99 F350 2WD SRW. If I push the brake pedal down fast and with force, I have good brakes. If I just push down so so, the pedal may catch while still plenty of brake pedal, but with light foot press on the pedal, the pedal will release and continue to move downward to within one inch of the floor. This is kind of scary as the truck starts to roll forward again! My first thought was a bad power booster, but changed this out with no major improvement. Then I thought that I may have air in the lines so I bleed the brake lines. Still not working right. Now what??
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More Turbo
Joined: Feb 2004
Posts: 509
Likes: 3
From: Findlay, Il
The pedal doesn't go clear to the floor(maybe an inch), truck does come to a stop, but not with the force of a power boost. Could a rotor be worn beyond its limits, letting this happen?
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Posting Guru
Joined: Apr 2009
Posts: 2,447
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From: Northern Idaho
Check your rotors, check all 4 wheels for leaks, check the brake lines for leaks and be sure you are not leaking. Be sure your master cylinder is full and not sucking air. If you are not leaking but are still full then they are correct above. More than likely your master cylinder is going out and that is DANGEROUS!
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Fleet Owner
Joined: Mar 2007
Posts: 28,305
Likes: 6
From: BLT, MN
IF the fluid got low enough you could have sucked some air into the lines also. If all the other stuff checks out it wouldn't hurt to flush the brake lines and resivoir with new fluid and see if that firms things up.
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More Turbo
Joined: Feb 2004
Posts: 509
Likes: 3
From: Findlay, Il
R&R brake master cylinder, this was the problem. Now my dash brake light is staying on.
I have had the two lines diconnected on the master cylinder(now they are oilly) and the wire on the brake pedal.
I have had the two lines diconnected on the master cylinder(now they are oilly) and the wire on the brake pedal.
Senior User
Joined: Jan 2008
Posts: 339
Likes: 2
From: Upstate NY
im not sure what the hell you're trying to say here... but the light is on in the dash now because there is air trapped in the system somewhere. how'd you bleed it? did you bleed the entire system?
Senior User
Joined: Jan 2008
Posts: 339
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From: Upstate NY
