'98 Nissan 200 SX


#1

The brake pedal has a lot of drift. With the engine running, I hear a double click sound when I step on the pedal and release it. With the engine off, I hear a noise similar to a fart or a cow mooing when I depress the pedal. When I pump the pedal it tightens up. I had to add a little brake fluid to the reservoir. I can’t see any leaks. What’s going on, and how can I fix it myself?


#2

The click is probably the brake light switch. If the brake fluid level got too low there could be air in the system, which would need to be bled. A vacuum leak or a bad brake booster are also possibilities.


#3

Thanks for the info. How can I discover a vacuum leak or determine if the booster(master cylinder?)is faulty?