Brake pedal intermittently sinks to the floor no fluid leak master cylinder in new what could be causing this?
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Brake pedal sinks to the floor randomly. There are no fluid leaks and we changed the master cylinder and bled the brake system twice and the brake pedal still randomly sinks to the floor.
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There are specific testing procedures to identify the actual failure - however these procedures are not recommended for the DIYer as special tools and talent will be required.
Testing involves isolating each wheel brake to determine which area of attention is needed - then pinpointing the culprit..
Suggest professional *hands-on* assistance.
