Low brake pedal 2004 ford escape

dbillock

I changed the master cylinder and bled the brakes and after a day the pedal goes low and sloppy again. I bought a new master cyl not a reman.. What could the problem be?

Mr_Shiftright

If you didn't "bench bleed" the master cylinder, this might be your problem.

Here's a good video on all aspects of BRAKE BLEEDING/BENCH BLEEDING

dbillock

Yes I did and also the brakes. Should I bleed them again? Could it be the power booster?

Mr_Shiftright

No harm in bleeding them again. Generally a bad power booster will give a low, but very HARD, pedal, unless it's actually sucking brake fluid into the engine--which you would notice every time you pumped the brakes with the engine running.

You might have to pay to have a power bleed done or perhaps have it done with a factory scan tool. You should call your Ford dealer and find out the proper bleeding procedure and whether your particular ABS system requires a scan tool bleeding. Some do, some don't.

dbillock

I'll try bleeding again, thanks.

dbillock

I rebled the brakes and they are working fine now. Thanks.

Mr_Shiftright

Well good! Keep an eye on fluid level to make sure you don't have a sneaky leak somewhere.

dbillock

Went soft AGAIN. Air in the lines AGAIN. Not loosing any fluid that I can see.

Mr_Shiftright

The only thing I can suggest at this point is to check with the dealer as to whether your ABS system needs to be bled with a scan tool or if pressure bleeding would solve this.

thecardoc3

Pull the "new" master cylinder off of the brake booster and check to see if the fluid is leaking from the rear of the master cylinder and into the booster.

dbillock

I'm NOT loosing any fluids. I found a twisted rubber line on the right front and I'm going to change that next.