I have a problem with the peugeot 306 1.8 gasoline servo, (it does not have the Blessed APR system, nor the bosh anti -lock), it lost air through the pedal but does not lose any liquid, and stops well, but when you release the brake pedal it releases air below the pedal, what can it be? Do you have a pressure and brakes, why does it lose the air below? If the diaphragm of the servo was broken, would not official ???? Thanks for the attention! greetings!!!!!!