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Home >> Acura >> 1995 >> NSX Automatic >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Disc Brakes & Drum Brakes >> Testing >> Brake Booster Unit >> Leak Test

Leak Test

  1. Press brake pedal with engine running. Turn ignition off. If pedal height does not change with pedal pressed for 30 seconds, vacuum booster is okay. If pedal rises, vacuum booster is leaking.
  2. With engine stopped, press brake pedal several times with normal pressure. Pedal should be low when first pressed. On consecutive applications, pedal height should gradually increase. If pedal height does not change, check power brake booster check valve.
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