So many warped rotors .. , COULD it be the brakes rotor is to small for a car that weighs around 8,00lbs HMMMMMMMMmmm
i bet there are 9 out of ten people with excursion that have the same problem, leaning to 10 out of 10 more like it and ford has all the answers hmmmmmmmmmmmmm
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Normally a "pulsing" brake pedal means that that you have a warped brake rotor or the brake caliper is lose. I would start by taking the front wheel off and inspecting the brake pads and the rotor. If the brake pads are worn down bad replace them. Pay special attention to the brake rotors also as if the are grooved very bad, they should also be replaced.
Your disc brake rotors are warped. Solution? Remove the disc brake rotors and have them turned on a brake lathe. Warpage comes from a hot disc brake rotor going through a puddle of water which causes the warpage. If you have a Parking Brake, get in a safe area and when stopping, ONLY apply the parking brake. If the steering wheel stops shaking...there's your problem...warped disc brake rotors.
If I understand your question, it appears to be shaking only while braking and no other time. If this is correct, then you have warped brake rotors and/or rotors that are improperly torqued (which may result in warping). If the rotors are not either worn or warped excessively, they MIGHT be brought back into spec by turning them on a brake lathe, otherwise you will have to replace them.
you need new brake pads and rotors and possibly calipers, the rotors are most likely warped. or the pads are worn enough where the caliper piston extends to the limit and is not stable in the caliper and wobbles.
I'm betting it is the rotors. Warped rotors might cause your problem. Turned rotors that are too thin will warp when heated. Calipers that are sticking or grabing might also do this. A good mechanic should be able to diagnose it after driving it.
Remove caliper and caliper bracket, also make sure you don't have parking brake on, brake rotor will slide off, some time you will need hit the rotor with a hammer between the studs on the rotor, be careful not to hit the studs.
The most likely cause for your brakes grinding, especially on one side, would be a warped rotor. As the wheel spins this warped rotor is making contact with the pads. As you apply pressure the pads make full contact with the rotor causing the noise to stop. The pads may also be bad. Too much heat will cause the rotor to warp. Your best bet would be to replace both the pads and the rotor as either of them can be causing the problem. I do NOT recommend changing just one side of your brakes as this causes uneven braking and is ultimately dangerous.