Brake booster making popping sounds

1992 HONDA ACCORD
228,000 MILES • 2.0L • 4 CYL • 2WD • AUTOMATIC
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LIZCOOKSRA
  • MEMBER
  • 1 POST
While in Park with engine on, or while car is moving slowly with or without brake pedal depressed, there is a distinct gurgling/popping sound coming from the brake booster or so close to it that it appears to be the brake booster. Any suggestions as to what the problem is and whether this is an immediate safety issue?
Oct 6, 2019 at 8:47 AM
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JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,244 POSTS
Welcome to 2CarPros.

The brake booster on this vehicle operates on engine vacuum. To eliminate that as a possible issue, I need you to disconnect and plug the vacuum supply to it and then start the engine to see if the noise is gone. Note: With the vacuum hose disconnected, you will lose power assist, so don't drive it until it's back together.

I attached a picture below and highlighted the hose I am referring to. If you don't plug it on the engine size, it will cause a large vacuum leak and the engine will most likely not stay running.

Do this and let me know if it makes a difference.

Take care,
Joe
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Apr 9, 2021 at 6:32 AM
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