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Power Brake Unit

WARNING: This page is about a different car, the 1991 Plymouth Laser and 1991 Eagle Talon. However, it is still accessible from the selected car via links, so may be relevant.
  1. Run engine for 2 minutes. Turn off engine. Press brake pedal several times with normal pressure. Pedal height should be lowest when first pressed but should gradually become higher each time pedal is pressed.
  2. With engine stopped, step on brake pedal several times to ensure pedal height does not change. Press and hold brake pedal and start engine. Pedal should move downward slightly.
  3. With engine running, press and hold brake pedal and stop engine. Continue holding pedal down for 30 seconds. Pedal height should not increase.
  4. If power brake unit does not test as specified, test check valve and vacuum hose. See CHECK VALVE (POWER BRAKE UNIT)  under TESTING. If check valve and vacuum hose are okay, replace power brake unit.
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