How do I troubleshoot my brake booster?
Easiest thing is start the car. Let it idle.
Shut it off and if there is no power assist for 1 or 2 brake applications, you have a leak somewhere.
- The one-way valve at the outside of the booster
- The valving inside the booster
- The diaphram
Define little to no brakes.
Even if there was no vacume in the booster you would have brakes it would just require more pedal pressure (like manual brakes)
