# '98 Nissan 200 SX

**URL:** <https://community.cartalk.com/t/98-nissan-200-sx/21876>\
**Category:** Maintenance/Repairs\
**Created:** [November 9, 2008, 4:02pm UTC](https://community.cartalk.com/t/98-nissan-200-sx/21876 "2008-11-09T16:02:40Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![will4life](https://avatars.discourse-cdn.com/v4/letter/w/34f0e0/32.png) [@will4life](https://community.cartalk.com/u/will4life)\
**Post date:** [November 9, 2008, 4:02pm UTC](https://community.cartalk.com/t/98-nissan-200-sx/21876/1 "2008-11-09T16:02:40Z")

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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?

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**Author:** ![mcparadise](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/mcparadise/32/32_2.png) [@mcparadise](https://community.cartalk.com/u/mcparadise)\
**Post date:** [November 9, 2008, 4:17pm UTC](https://community.cartalk.com/t/98-nissan-200-sx/21876/2 "2008-11-09T16:17:49Z")

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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.

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**Author:** ![will4life](https://avatars.discourse-cdn.com/v4/letter/w/34f0e0/32.png) [@will4life](https://community.cartalk.com/u/will4life)\
**Post date:** [November 11, 2008, 4:07pm UTC](https://community.cartalk.com/t/98-nissan-200-sx/21876/3 "2008-11-11T16:07:58Z")

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