Noisy Brake Pedal

[keleko17]

My 2007 has a noisy brake pedal. The vehicle is my wife's daily driver, and I can't really tell if it is affecting the braking, or just an annoying noise. I feel as if I have to push the pedal harder than I used to, but again that could be just my imagination.

Doing a Google search, I found some F-150 forums that ranged from a brake booster, to a linkage, to needing to change the brake fluid.

If it is the linkage, they said to use silicone spray.

The only way I can describe the noise is an old man groaning. If I keep the pedal constant, it gets quiet. But if I adjust my pressure, it keeps going.

Any help? Or anyone have the same noise?

 

[Bobmbx]

That sounds like a booster moaning.

Try this: when you come to a stop, apply the brakes as you normally do, and if safe, let go of the brake pedal, and then quickly re-apply the brakes. If the pedal is harder, and you have more brake authority, your booster may have a leak.

 

[Explorer_PL]

My 06 v8 has the same noise, no isues with braking, no fluid leak anywhere. I have had it for probably 3 years or so. 159k miles, and I have not changed the fluid - I know I should have long time ago. Probably this summer.

 

[bryris]

The master cylinder is bad and needs replacement. Just went through this on my 06. Trust me.

 

[keleko17]

So, assuming one of the above is the right diagnosis, is there a safety issue?

I am not a mechanic, if I was I wouldn't be asking for help

 

[Bobmbx]

So, assuming one of the above is the right diagnosis, is there a safety issue?

I am not a mechanic, if I was I wouldn't be asking for help

Yes. Maybe not now, but your brakes are failing. I had a Chrysler 300M that had the moan, and squishy pedal. Over time it kept getting worse, until finally one day in high speed heavy traffic everyone slammed on their brakes, and I found that I didn't have any. I pumped the pedal like mad and luckily it hardened up before I ran into the guy in front of me. That resulted in a new booster and master cylinder that night.

Rule of thumb: If your brakes aren't perfect, you're at risk. Its the only thing on the car you should not cut corners on.

 

[keleko17]

That sounds like a booster moaning.

Try this: when you come to a stop, apply the brakes as you normally do, and if safe, let go of the brake pedal, and then quickly re-apply the brakes. If the pedal is harder, and you have more brake authority, your booster may have a leak.

I tried this, and I didn't feel as if the pedal was any harder. Does that eliminate a booster leak?

 

[keleko17]

I called the dealership to see what they would say, he pointed to the brake booster.

Verbal quote to replace was in the neighborhood of $600

I'm sure there is a quick link on here to a video or tutorial, does anyone know where without me having to search?