Hello everyone. My Father-In-Law has a 1999 f150 xlt 2wd.
he had his brakes redone, new rotors and brake pads. However, he continues to have mushy brake pedal feel. The pedal seems to sink in further and further.Seems like pedal goes to the floor.

ANy ideas will be great.

Thanks,

 

you say it sinks in further and further... if it does not hold pressure then you have a leak somewhere. It might be external (you'll see a drip somewhere, reservoir level will go down over time) or it could be internal to the master cylinder (a seal is bypassing, the fluid pushes back into the reservoir)

if it is just soft, but it holds pressure... try bleeding it.

If it will not hold pressure, look for leaks. If you can't find one, then you probably need to replace the MC.

 

mkosu04,

Thanks for the reply. THE MC was replaced about a year ago and the problem didn't go away. How often should one bleed the brakes?

Should we have to bleed the brakes more than twice a year?

I have a 01 SCC 4x4 and have not had this issue.

Brakes will grab once the pedal is about 80% in.

Now the abs light is always on......

 

bleeding depends on a lot of factors (humidity, driving conditions, weight/towing, etc) but you shouldn't have to bleed twice a year. Most people only bleed when they change the pads, but even then if you don't open the system you don't necessarily need to bleed the brakes.

Have you tried replacing your flex lines? Maybe they are going bad and swelling when you apply the pedal.

 

Where are these flex lines located? Are they the lines that run to the caliper's?

Never mind i read the following article on flex lines:

https://www.f150online.com/forums/wh...pair-cost.html

How can one tell if the flex lines are bad? Will they be swollen?

 

Under normal circumstances you should never have to bleed the brakes unless brake work is done. If you quickly pump the brake pedal 3 or 4 times will the brakes grab with the pedal less than 80% down? If so, then the rear brake shoes probably need adjusted tighter. This is assuming you have rear drum brakes.

 

Haven't tried that yet. Will try it and post my findings.

Thanks