Frequently Asked Questions
Below are some of the frequently asked questions we hear from technicians on a regular basis. Use them as a resource at your convenience when you are performing a brake job.
The vehicle has an intermittent hard brake pedal and poor stopping ability. What is the problem?
Car owners may bring their car into your shop and complain about:
- Intermittent poor stopping performance
- A hard brake pedal
- The brake pedal being hard to depress in panic stops
In these cases, it may feel like the vacuum assist has been lost and the brake pedal is mechanically stopping. You may also hear air escaping from the booster while the brake pedal is depressed.
To troubleshoot this problem, have an assistant start the vehicle and step on the brake pedal several times. While they are doing this, follow the vacuum hose from the brake booster to the intake manifold. The back of the engine compartment between the firewall and intake manifold is typically where the problem occurs.
Feel the vacuum hose. If it is soft or visually collapsing and expanding in response to a change in the vacuum, the hose needs to be replaced.