F Series :: Sinking Brake Pedal On 1995 Ford F350 Diesel
Feb 12, 2006
1995 Ford F350 4x4, 7.3 Liter Diesel, A/T, A/C
The brake pedal gradually sinks to the floor while the truck is running while stepping/holding down the brake pedal, then the red brake light comes on in the instrument cluster. When the trucks engine is not running I could pump the pedal to clear the vacuum booster and hold the brake pedal, it stays steady.
So far I have replaced the vacuum pump and brake booster. I also readjusted the rear brakes. The truck stops fine, but the sinking brake pedal just doesn't sound safe.
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I don't know whats up with my new truck, its a 04 f250 scsb, 4x4, 5.4l with 61k orig miles on it. Truck will stop on a dime, has NO pedal sinking, but it takes about 3/4 of the pedals travel to apply pressure to the pads and have the truck stop, sometimes if I push the pedal down then let up and push it again the pedal wont travel as far, I just flushed the system today, no air in the lines, is there a bleeder on the abs? truck has 4 wheel abs...
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I have only 42k km or 26 k miles. Brake stops but soft. The brake pedal sink if you apply pressure after a stop. Feels like someone open a valve. The pedal go to very low. I am find the stopping power is poor. Brake fluid is brownish. I hope it is not the master cylinder.
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2006 Camry, intermittently the brake pedal sinks by going a inch or so further than normal. Car still stops and I don't think it is all the way at the floor. It is not very frequent, maybe 5% of the time. When it does occur it always happens on a second pump while slowing to a stop or turn, so the car is always going below 10 mph when it occurs.
Mechanic can find nothing wrong with the brakes themselves or any air in the lines. The fluid level is stable. I am guessing it is either the master cylinder or booster. Is there a way to diagnose which one it might be? Could it be a vacuum leak due to only showing up at low speed?
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After a recent front brake caliper replacement, the brakes work great except that when moderate pressure is continually applied to the brake pedal, the pedal goes all the way to the floor. While driving down the road, when the brake pedal is depressed, the brakes engage right where you expect them to, and the van stops just fine, even if the stop is extreme. There is no air in the brake lines. The front calipers have been replaced twice, the back brake cylinders replaced, the master cylinder replaced, the RABS valve replaced, all by a certified shop trying to address this issue.
I spoke with the service manager at a local Ford dealer in Seattle and he was aware of the problem and said that there is no solution. He said the brakes will work fine. He couldn't explain to me however, why this happens. If the van is not running, the brake pedal holds firm, so I assume the problem has something to do with either the ABS system or the power assist, but I can't say for sure. I can live with this since the van stops great. What is mechanically going on that allows the brake pedal to go to the floor even though the brakes are fully engaged after the pedal is depressed say a third to a half way down to the floor.
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Today I was going to launch my new boat and when I backed down the ramp, the brake went to the floor almost sinking the truck. Long story short, the brake line that runs along the frame to the rear brakes rusted through at a bend that I couldn't see. Seems the line is about 8 feet long. What I'd like to know is can I replace it without dropping the fuel tank which of course I just filled yesterday and can I obtain one at a ford dealer or will I have to order one. My truck is my only transportation.
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Purchased new 2012 Ford F350 to haul slide in camper. When I step on the brakes they go 3/4 of the way down. If I pump again, they go 1/4 of the way down (normal). Brought this to Ford dealer, they test drove the vehicle and admitted I had a problem with the brakes. They told Ford and Ford faxed a letter stating they are aware of this issue and there is nothing they can do about it. Stated this is a "soft braking pedal problem" with some of the 2011 and 2012 Ford trucks.
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I have a 95 Accord EX, 4 cylinder with ABS. The brake pedal goes to the floor about once a month, all times of year (I'm in Minnesota). I had the brakes bled last summer, but that didn't work. The ABS light has been on for probably 10 years. When I talked to my mechanic he said the ABS system, even though it's not working, could be a cause of the problem because fluid is still traveling through that system. He said most likely a master cylinder, but no guarantees. He said it could also be one of the brake lines. About 120k miles on it. What are the odds that it's the master cylinder?
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1987 F-350 460 Auto Trans. Brake Pedal slowly going to the floor. Stopped at a red light yesterday on a slight down hill and I noticed the brake pedal slowly going to the floor. I had to put the truck in Park to avoid bumping into the car in front of me. I checked brake fluid level and still at the full level, check rims for brake fluid leak from brake cylinder, none. Could my master cylinder need rebuilding or is my vacuum diaphragm going. Not sure that's what its called.
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my dads front drivers brake caliper was dragging so last Thursday he had the local Ford dealer install a new one WHY i don't know since i always work on everything of ours plus my friends Fords. Today he said he pushed the brake and it went to the floor then he let up and pushed it again and they worked?? I haven't looked into it yet but the dealer cant look until Friday morning so my dad asked me to do it today after work..... what should i check for? leaking brake line, maybe air in the system still?
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1993 Ranger XLT 4.0 AT. Initially replaced ECM for other problems and then noticed Cruise w/n disengage when brake depressed unless pedal is pushed several times and with more pressure. Put in another ECM and have same problem. Have replaced the brake switch and lights come on as they should. When pedal is pushed the vacuum dump valve on the pedal will dump the vacuum to the servo but when you release the brake pedal the cruise control kicks back in and speeds truck back to set speed.
So this tells me that the dump valve is only a fail-safe feature for when pedal is depressed and does not actually deactivate the servo. Everything else with the cruise works fine: On/Off switch, Set/Accelerate, Resume, Coast. How to proceed next? Like where to find speed control module and how to test it? How to check servo to see if it is getting or dropping voltage that will electrically disengage it, etc? Don't want just throw parts at it. The new ECU's that I used came from ECU Exchange in Florida and there still remains the possibility that they are still the problem.
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I have a 2008 Ranger Sport 4x4. I noticed yesterday that when I stepped on the brake pedal it felt like nothing was there until I step a little harder then it was like full brake application. The truck only has 63000 on it. Then every once in awhile it would be normal ie very light brake application and slows like it should. Then back to same issue... Any thoughts about this??
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I have a 2010 Ford ranger sport 4x4, manual, and when backing up at a decent speed, then press the brake to slow up then depress the clutch, the brake pedal pulsates and it feels like something is grinding. It has happened in first once, but I can make it happen in reverse anytime...
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acts like abs sensors could be bad. but the brake pedal goes almost to the floor, after it does it's pulsating. But the abs light does not come on. I already changed brake booster, no change!
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So, a few day i bought an 84 Ranger and even since have not been able to figure out what the hell is wrong with the brakes. I know it's not the brake booster for starters. Because, i went to Auto Zone and picked up a new one and when i took the old one off (before i had put the new one on as well) i tried to see if the brake pedal would now move freely and it won't. It is still very stiff and squeaks when you push it down. i then to get it to return have to pull it up with my foot... What it might be? the WD-40 failed here as well.
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I have a 2006 F350 Crew Cab with the 6.0. It is used primarily for towing a fairly heavy 5th wheel RV. I find that the accelerator pedal pressure is much higher than any previous vehicle I have ever owned. The problem is magnified by the fact that I have a previous ankle injury that makes it very uncomfortable to have to press on the accelerator so hard for long periods of time.
I try to use the cruise, which sometimes works on flat ground, but the shift point at my desired cruising speed is such that the slightest grade will make it downshift. With the cruise off and my foot kept at a constant pressure, the truck pulls up the slight grades just fine with no significant loss of speed and no downshifting.
Is there any way to lighten the pressure it take to push down the accelerator? I know it is actually moving a throttle position sensor, but is there also a pedal return spring here that is too stiff for me?
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2001 F-350 / 7.3L / 147K ... What are some symptoms of the master cylinder going out? And is there a such thing as a rebuild kit anymore? The pedal has been getting spongier & spongier over the past months. Truck still stops O.K. but you have to brake earlier than I used to. Pedal can go almost to the floor. Pedal continues to go to floor as pressure is applied. Does not go to floor though.
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What is the likely culprit? No other electrical issues, brake light quit working when brake is depressed, all other lights work including blinkers/running/head. Was going to break out a wiring diagram....
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I have a 1990 4x4 ford Ranger, the little truck was purchased in early 2008 as a work truck but has ended up becoming my main vehicle, it has been a good truck for the most part but know I am having some brake issues, well have been having for some time but they seem to come and go. Usually it happens when I have to hit the brakes hard, the rear brakes lock up, I replaced the master cylinder months ago and thought that fixed it, then a month later it happened again. The last time it happened was friday, the time before that was in march 09'.
I have searched this online and found numerous try this but the original poster never comes back to say if the problem is fixed or what fixed it. My ABS light DOES NOT come on when this happens, it does function properly, it illuminates when the key is turned on then goes off. My parking brake no longer works either but I think that is from me "driving thru" the locked up rear brakes. I plan on replacign both drums and shoes within the next week but would like an option to repair the locking up issue.
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1999 ford f350 diesel. Have burnt up 2 starters and 2 solenoids. Truck tries to start itself if you do not disconnect batteries. The last time it did it it also burnt up window control switch. Keys don't even have to be in it. Where to start to find a short???
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Does the 2015 F350 have the dead pedal on the left drivers side? The one they used to put in to rest your foot on?
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