I have a 1989 Ford Thunderbird and my break peddle feels real touchy to the point to were I will come to a complete stop QUICKLY by just barely touching it. Than whats wierd is that during the same drive my break peddle will feel spongy to were I wonder if I will stop. It goes back and forth. Also my break lights dont work that much, only sometimes. When I go on the highway and break the right wheel feels like its going to fall off right than and there, acompanied by a distinct burning smell. Please help me figure this one out. Thank you, Cory
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I am fairly certain you have a bad master cylinder. I had a chevy truck which emptied the back bowl completely and the cause of this was a failed seal on the rear of the master cylinder. The fluid was sucked into the engine through the power booster and burned off while driving. If the back bowl for the rear brakes is empty, then this may be the cause.
Sounds like you have warped rotors and or a lose caliper mounting bolt . When you stop do you feel a vibration in the brake peddle or in the steering wheel or both ? IF you feel the pulsation in the brake peddle I would suspect a brake pad / brake rotor problem . Now if you do not feel it in either and the vibration is through the whole car with out the brakes being applied i would think it may be related to and engine/drive line problem (motor mount /trans mount /axle problem)
It is a defective brake booster. When the internal diaphram of the brake booster develops cracks or pinholes from age, the crankcase vacume pulls air through the defective break booster diaphram from the air intake valve located on the rod connected to the brake peddle. At first the air leak sound my change or even go away when the brake peddle is depressed. But over time the booster diaphram will detierorieate to the point where the air leak sound will be contiuious. This is a problem that should be addressed ASAP as a defective break booster reduces the power assist to the break peddle and may make it difficult to apply enough break pressure to stop in an emergency situation.
Have the brakes checked by a certfied brake shop right away.