Ford F-150 (2009-2014) :: Low Brake Fluid Dash Lamp Illuminated / Blown Master Cylinder Booster Assembly
Jun 23, 2015
Just wanted to report another F150 with the blown master cylinder problem and had a few questions regarding the issue. Its a 2014 Screw EcoBoost with about 12500 miles located in Michigan.
I was driving last Friday (6/19) when the low brake fluid dash lamp illuminated. I made it to my final destination, when I began to back into a parking spot the brake pedal dropped to a position about an inch off the floor. Parked the truck and popped the hood to find almost all of the fluid gone. Only having fluid in the rear axle reservoir of the brake circuit. Pulled the vacuum sensor and the booster is filled with fluid..
Called Ford, had it towed to the dealer and its been sitting there ever since.... They have no loaners and have not even looked at it yet. I'm going to assume no parts are in stock just like all of the other threads I have read on here about this issue.
A few questions I have for those of you who have had this problem or have knowledge about it.
1. How long did it take for your truck to be repaired?
2. When the master cylinder seal leaks all of the fluid into the booster and the booster is pulling engine vacuum; does this mean that brake fluid is then pulled into the crankcase of the engine?
Really looking to get my truck back soon cause I love driving it! But the '74 F250 will have to do for now ....
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I have replaced booster, master cylinder, all four callipers, and bled the brake system a number of times on my 2000 F-150 4x4. and still the pedal is wicked spongy, is there some other problem?
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A few years ago I (for him) replaced all 4 calipers, rotors, pads, etc....things were good. Just recently he replaced his Brake Booster and Master Cylinder (not sure what led to this), but long story short everything is back together and he doesn't have brakes.
My GUESS is that the system needs a good flush, new fluid, etc....
My problem is I'm unsure how to bleed the ABS system. A few google searched indicate I need a scan tool, but is there another way? Can I jump something.
So my question, how do I completely bleed the brake system on this truck?
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Early 70's Ford truck. The brake MC fluid is filled but not overfilled, and doesn't leak at all when the truck is parked. It can sit there for a month and never leak a drop, parked. But when I drive the truck, even just around the block, then park, and look inside the engine compartment immediately the brake MC is dripping brake fluid. It appears the leaking mode is by the fluid somehow jumping up and coming over the top edge of the MC when the truck is in motion or when the brakes are applied. All my diy'er years of replacing brake master cylinders on Ford Galaxies, VW Rabbits, Corollas, and this truck, I've never seen this kind of weird brake problem before. On this MC design it seems there's sort of a rubber baffle inside the lid of the MC, and that's present and accounted for.
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I have replaced the cruise control cut off switch and post-recall pig tail twice in two years for fluid leaks. Whats the deal do they all leak?
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My 2003 Toyota 4 Runner with 104K miles recently started showing a brake light off and on. The brake fluid reservoir was at the minimum level and there was some residue leaking from the bottom near a silver disc. Took it to a mechanic and was told it was most likely the master cylinder leaking brake fluid. Is this normal wear and tear or is it unusual in this vintage vehicle? I do not notice any brake slippage at this point. Should I take this to the dealer and ask why this master cylinder is faulty? I thought Toyotas were long life vehicles?
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I have power steering fluid leaking out of the bottom of the Brake master cylinder out of a round hole. Every time I pushed brakes it leaks a good amount of power steering fluid out. Why it would do this and is there a screw missing out of the hole or what?
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I've got an o2 camry with 150K that seems to be losing brake fluid from the "right" side of the reservoir. Which brake lines are supplied by the "right" half of the master cylinder reservoir? I have read that they could be diagonally piped.
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I have a 2011 F150 FX4 Ecoboost w/ 37K. I recently had to have the master cylinder replaced along w/ all my brake pads because it was not disengaging the calipers properly, so all of my pads were prematurely worn and cracked. I was wondering, it seems like this shouldn't happen on a truck this "young".
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I'm getting ready to work on a 2000 Pontiac Sunfire for a co-worker. They told me that brake fluid leaks out where the fluid reservoir attaches to the master cylinder. Could that be a bad master cylinder or something with the brake booster? It looks like there is a lot of sludge in the reservoir.
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put new master cylinder and bled brakes in 1978 jeep cj5 and now fluid is being forced out the rear brake reservoir in the master cylinder, if lid is off there is about a 1inch fountain of fluid that shoots up.
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I recently noticed that my brake fluid was leaking in my 2003 Hyundai Elantra and upon further inspection I found the leak was coming from a part near the master cylinder. I looked online and couldn't figure out if this part was part of the master cylinder or brake line or a part all on its own. I tried tightening it but It still leaks some. I read a similar post online and that it could just be that the washer needs replaced but I just wanted to check on here to see what the part is called and if I should just replace the whole thing. I included photos as well.
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Yesterday the brake warning light came on in my 13 350. I checked, and the fluid level in the master cylinder was at the "min" line. I don't think I've ever had to had brake fluid in any car before. Seems to be Ok today, but I was wondering if other folks have had this happen? Of course if it happens again I'll have to check the brake system. Just wanted to check.
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2011 F150 SCREW FX4 6.5' box Ecoboost... All of a sudden I had no power assist for the brakes.
In a "unit down" situation waiting for a replacement vacuum brake pump assembly from Ford? My truck has been stuck at the dealership for going on three weeks now waiting for this part. No one seems to be able to say when the part will be available, which suggests to me that Ford is waiting on the supplier to produce more.
They're paying for a rental, but the 2013 Escape isn't anything near my F-150. A week maybe, I could understand, but on 6/11/2013 it's going to be three full weeks since my truck was towed into the dealership. How many of these things are on the road? How do they not have this part readily available?
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Out driving the other day and suddenly lost power and dash illuminated the EPC and Malfunction Indicator Lamp. Did a bee line to my home and experienced loss of power and engine vibration. At traffic lighta it emitted large quantities of white or blue smoke that smelled like gas.
Connected to VCDS and had 4 codes:
000768 - Random/Multiple Cylinder Misfire Detected
000769 - Cylinder 1 P0301 - 000 - Misfire Detected - MIL ON
004874 - Cylinder Disabling
000135 - Fuel Rail/System Pressure
My assumption was a bad coil, so I swapped them but no joy. Then decided to swap coils and plugs and observed cylinder #1 was filled with gas. Siphoned it out and it was able to fill about 1/4th of a beer bottle, or 3 ounces. Top of piston #2 looked slightly wet, but the origin could have been overflow from #1 via intake manifold. I'm thinking #1 injector stuck in the open position. Car is out of warranty so it may be on my dime unless I can convince dealer that this is power-train or emissions related. Best case, I need one or two injectors, oil replacement from gas contamination, plugs and labor. I thought about the worst case and it could be the above + a complete short block + catalytic converter. No tune, 100% stock
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My 2010 screw 5.4 has only 20K on it and last week the low brake fluid light came on. Yes I know I need to do the pads and with the little miles the truck gets I was waiting on slightly milder weather to address this. I added fluid and went on my way. Last night the light comes on again, my guess there is a leak somewhere. BTW truck stops fine. First question; Any recalls on the brake system? I bought the extended warranty so since this probably isn't pad or rotor issue should the dealer fix the problem? I'm in a real bind here as my lady in is rough shape health wise and I need this truck ready to roll at all times.
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I have a 1999 Ford Explorer Sport 4.0 SOHC.
I change the rotor, calipers, and pads on the front end.
When I went to bleed the brakes I got some fluid, then I got none.
I can hear fluid squishing around up near the master cylinder, but none coming to the caliper.
I see a bleeder screw on the master cylinder.
Before the car came to me the person had, had low fluid, but had brakes. Now the pedal just goes all the way to the floor with no effort.
There are no leaks or broken lines anywhere.
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I replaced my MC cap and gasket less than a year ago with a Dorman replacement and I'm leaking again, already. I don't want this to be an annual thing! Any good quality replacement? Is there any tip or trick to get the gasket to seal better?
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...Is there anything special that needs to be done for brake bleeding after putting in a new master cylinder? I decided today to flush my system with my vacuum bleeder and now my pedal slowly falls to the floor at a light...No problems in a panic stop or otherwise, just falls to the floor slowly when braking...no leaks, so I'm assuming a master cylinder is an order....
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Why the brake lines have 2 or 3 coils in them near the master cylinder? Makes it a real pain to work on anything down in that area. Always snags ratchets and stuff...
My brother and I were discussing it the other nite, and the conclusion we came up with was, the first guy ever who was installing a brake system had tubing that was a couple feet too long, and couldn't find a tubing cutter, so he coiled them up.
Then the next guy saw that and figured "hmm, so THAT'S how it's done", and so on... Kinda like the story about the lady who always cut off both ends of her ham before she put it in the broiler..
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red dash light comes on after 1 km, most times. dealer says abs module but no abs light or codes
brakes are fine
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