What are the symptoms of a faulty vacuum booster pump?
1 Answers
Symptoms of a faulty vacuum booster pump: 1. Poor braking performance or no braking effect; 2. Visible oil leakage at the external connections of the vacuum pump; 3. Slow or non-returning brake pedal. The function of the vacuum booster pump is to use the vacuum generated during engine operation to provide assistance to the driver when braking, making the brake pedal easier to press. If the vacuum booster pump is damaged, there will be no assistance, making the brake pedal harder to press. Generally, the vacuum booster pump cannot be repaired and must be replaced. The working principle of the vacuum booster pump is to use the engine's intake vacuum to assist in braking, and it does not require special lubrication.