Pulsating Brake pedal. HELP!

Sounds like improper bedding in of the new pads....they need to cure
and during that process they out gas friction material that deposits
on the rotor.

That is the best braking...when they are properly bedded in...but if
you stopped rolling while they were still out gasing...they will bake
on a high spot.

This also happens all during it's life, but the most out gassing is
during the curing process

See below




Below quote from: Brake Question - 2005 Dodge 2500 2x4, 2014.6.16

BenK wrote:
Rebed them...

Here is a good thread about curing new friction materials...or do a
search using: brake, bedding in

Most all say about the same thing, though there is a slight difference
on HOW2 between regular vs performance vs race

Brake Pads page4

BenK wrote:
Don...didn't want to say it before, but now that you've indicated that
you have glycol 5.1...it is a very good thing.

ABS modules cost in the thousands of bucks and they have the same seal
problems with silicone as normal OEM braking systems

As for the other poster who said new pads had the warped rotor feel...it
most likely is NOT warped rotors but a need to cure and bed in the new
friction materials (pads)

All friction materials need curing and when on vehicle brakes..the term
is bedding in.

The softer materials need more curing than harder materials

What is most likely in your case is that you stopped moving when the
friction material was still curing. Hot and outgassing to create a
high spot on the rotor surface.

Only takes a few ten thousandths of an inch to be noticeable on the
brake pedal

Do a search here and/or on the internet using: "brake bedding in" and
you will find many methods. Most are generic, but there are differences
between mud hen freebies that come with rebuilt calipers all the way
up to pure track/race pads.

This is one of the better explanations and is also my opinion on the
matter. I also bed in my brakes differently, but won't list it here
and best to use these folks. Hot link below

Pad and Rotor Bed-In Theory, Definitions and Procedures
StopTech's Recommended Procedure for Bedding-in



This is also a good one:
Zeckhausen Racing