Hello Scotty. I own a Suzuki Swift 2009 1.5 automatic. I am facing a brake issue but I can't tell which is the faulty part. It has happen to me on multiple occasions now. Usually after I hit some…

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Hello Scotty.

I own a Suzuki Swift 2009 1.5 automatic.

I am facing a brake issue but I can't tell which is the faulty part.

It has happen to me on multiple occasions now. Usually after I hit some uneven road surface at high speed and may or may not trigger ABS.

My brake pedal after that will seem to travel further than it normal does before the brake force kicks in. Example if my brake pedal usually takes 3 inches to reach 100% braking. Now it takes like 4 to 6 inches. (just a random measurement illustrate)

Say I'm driving for a bit without touching the brakes. And when i need it. The first brake will seem normal (doesn't travel further than it needs to) but then consecutive brakes, the pedal will travel further before I get the brakes.

And whenever I release the pedal. It makes this weird sound like it is sucking in air.
In the engine bay I can hear air releasing when I press the brake pedal.

Here's a link, you can hear the sound.

Usually after a few hours of driving and braking it will usually go away. But I'm still worried.

I've already tried doing some test myself:

  1. pump the pedal when engine is off. It becomes hard and when engine turns on pedal sinks normally (into that further position)

  2. detached the vacuum hose of brake booster and i can hear vacuum suction and engine idles very very poorly

  3. Press the brake while engine is on and turn off the engine and hold for 30 seconds. Pedal doesn't move at all.

  4. Brake fluid remains the same.

  5. Just got my rear drum brake lining and brake pump changed not long ago.