Ford - Fusion :: 2007 - Brakes Stay Soft After ABS Engages


Jan 15, 2013

I have a 2007 Ford Fusion (I4). Recently the brake pedal goes extremely soft after the anti-lock brake system engages. It can still brake, but I have to press the pedal almost to touching the floor. It will stay soft a while (at least 20 min, probably longer), but I found that if I pump them hard a few times (like while at a red light) it then returns to normal.

My mechanic can't figure out why it doesn't immediately return to normal after the ABS engages, and he's not sure what to replace to fix it. I don't have the cash right now to just go replacing lots of stuff, hoping it might work.

(He even mentioned the possibility of removing the ABS fuse to prevent the ABS from kicking in and triggering the problem. Though wouldn't that be a step backward, safety-wise? I always heard that ABS is much more effective than pumping brakes manually...)

What's causing this and how to fix it?

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My daughter has a 2007 Ford Fusion with brake issues. Brakes are squishy after the car is "jarred" (i.e. hits a bump or pothole). The brakes go almost all the way to the floor and return to normal after a driving for a while. All the work described below has been performed by Ford dealers (at great expense): Master Cylinder replaced, all brake pads replaced. Brakes have been bled numerous times. When we bring it in they bleed it and say it's fine, next "bump" and the problem comes back. We're really at our wits end, the car is, at many times, scary to drive.

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I have this truck (in signature below) that I have not driven for ~3 years. As I am starting to drive it I am noticing I need to put A LOT of pressure on my brake pedal to get the brakes to work. They stop the truck and the pedal doesn't feel soft as if there is air in the line but it feels as if I apply a lot of pressure and there isn't a lot of grab.

While it might be possible, I don't think I have any type of glaze or coating on my brakes that would cause this. 95% of those 3 years, the truck was inside.

I wonder if it feels as if the truck is hard to stop because of the additional power I have coming from this new motor?

Is there any type of part I can replace in the brake booster to adjust the pedal? Or brake booster. Maybe that is going bad?

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1. Should I go ahead and get it done, or wait and see if the check engine light comes back on? I usually only drive the vehicle about 10 miles a day, and it's all city driving.

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My son just bought a 97 F150 with the back brakes blocked off. The front brakes had about full pedal when the was on. We changed the front calipers and brake pads. Bled them came back with great brakes (with back brakes blocked).

Then we found out the back calipers was none so we bought all new parts for both back brakes, found some leaks in the rear lines fixed them. Now we bled the brakes with the motor off till no air came out. Solid pedal. Then turned on the motor and the pedal goes down 3/4 of the way now easy.

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My suspect is the master cylinder but was wondering if the symptoms are common with the master cylinder failing? I'm thinking internal o-ring has failed due to the near accident event. I'm going to do power steering flush just because I never have. Is there anything that would display these symptoms that I could check before buying the master cylinder?

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So a few week back I noticed my brakes were getting soft. Soft meaning that when braking for any distance, I would hear a kind of "pressure release, squeaking" sound coming from the pedal, and the pedal would sometimes go to the floor and the ABS would kick in. Let me tell ya, its a pretty crappy feeling when your brakes aren't doing what their supposed to! So, I replaced the pads all the way around, replaced the master cylinder (bench primed). I took it out for a drive, and it did the same thing. So thinking maybe the fluid is bad, I flushed new fluid through the lines. Took it for a drive, and it felt good right away, the pedal firmed up a bit, and then it did did it again.

Just so I give as much info as possible, the rotors are looking pretty rough and going to be replaced soon.

So, my question[s] are; What is the next step in identifying the problem? Is there a chance the new master cylinder is bad? Could worn rotors cause the caliper to max out and not apply enough pressure? Even though the calipers seemed fine while replacing the pads, could one or more be bad? If so, how do I know?

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Ford F-150 - 1997-2003 :: Soft Brake Pedal With Hiss While Applying Brakes

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I was noticing a couple days ago (maybe I never noticed it that much as it was a new vehicle to me) that when I apply the brakes it sounds like a bicycle pump and the pedal travels nearly all the way down. It doesn't hit the firewall but I'd probably guess it has 3 more inches or less until it bottoms out. The hissing only occurs as the pedal travels and stops when the brake pedal isn't moving.

Now I'm not sure if the hissing sound is normal as I replaced the brake booster (from the junkyard though) and the new one still hisses when I apply brakes. The brakes seem to work okay, could be more sensitive it's just the pedal feels soft until it almost bottoms out like I stated before and the the brakes grab a little bit harder. What could it be?

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I have a 79 f150. I changed two brake lines and master cylinder and bleed,and more bleed,but still very soft all most to floor? wheel cylinders look good.

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I have a 2007 Ford Fusion SE 2.3L 4 cylinder. It has approximately 94,000 miles on it. I purchased new Sumitomo tires with a 100,000 mile warranty in February of this year. They were balanced and aligned at the time of install. So far they have been very smooth and quiet with great grip. About 2 months ago I started hearing a noise that sounds like uneven tire wear, a sort of rhythmic rubbing or wobble sound that increases in frequency as the speed increases. It is most noticeable at speeds between 30 and 50mph. I rotate the tires every other other change (at least twice a year) and had the alignment done again in late October. I am hoping that there is nothing wrong with my virtually brand new tires. Is there anything else it could likely be?

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I have a fully charged and known good 12v battery in the car. And when I remove it, the key comes right out. If I bleed the brakes, do you think that will solve the problem?

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A while ago I had to lock up my brakes to prevent an accident. now my brakes are soft and spongy, going all the way to the floor and still not quite stopping. making abs type noise. also, i can press all the way down while standing still, with the same type noise.

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The pedal used to go right down to the floor and would barely stop the car from a crawl, in response I have bled the brake lines to all calipers, and checked the hydro booster fluid level, and with only slight improvement the pedal almost hits the floor.

I am thinking the brake master cylinder is shot. The pedal becomes solid after about 15 pumps when off, and holds pressure, when on it takes several pumps to build any sort of pressure and cannot be built up to the solid point, and looses pressure quickly when just holding the pedal down.

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I have a Hyundai Santa Fe 2005 2.7L 4WD ABS.

The problem is that the Brakes pedal is so soft, that it goes to the floor, and doesn't brake at all in first pedaling. I am able to apply brakes after pumping the pedal thrice in continuation and then when it builds up some pressure, then it brakes and I'm able to stop the car. Once, I take the foot out of the pedal, it goes bad again. Once, again if I have to apply brakes, I have to do 3-4 times pedaling.

The brakes are stopping the car fine when they get applied in 3rd or 4th pedaling and when pressure is built up. Its the pressure not getting built up or maintained in the first go.

What has been done by the mechanics to solve this:
1. Master Cylinder has been replaced with a new one. (This has been done twice)
2. Brake Pads have been changed.
3. Brake fluid has been replaced and is upto the brim in cylinder reservoir.

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Added info: I do not feel any pulsating in the pedal but there is a pulsation in the SUV when it coming to a stop. Feels as if the rotors may need to be turned but the pulsation is not hard it is smooth.

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