Robotic brake noise...part 2?

[jblackburn]

I would still suspect the leak. I turned my car off as I coasted into a space with my foot on the brake. When I flipped the ignition back on to eject a CD, that's when I heard the vacuum pump.

In any case, guess you'll know soon!


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[20131pz69]

Alright so the 1.4's have an extra vacuum pump to compensate. The service tech said I should bring it in. Have to wait for my PCV pipe to come in before I do it so it will be next week sometime.

might I suggest a catch can delete prior to the service? Don't want the techs to think u did something that caused it & make the service difficult ...

[Chevy Customer Service]

Alright so the 1.4's have an extra vacuum pump to compensate. The service tech said I should bring it in. Have to wait for my PCV pipe to come in before I do it so it will be next week sometime.

titan2782,
I would like you to keep me posted on the progress with your dealer. If you have any questions please feel free to contact me.
Thank you,
Stacy Chevrolet Customer Service

[jblackburn]

Titan,

This is what you're hearing, right?

I coasted to a stop after shutting the engine off. After stopping, then hitting the brake pedal one more time, the pump started running, and will every time I hit the brake pedal after the car loses vacuum.

[titan2782]

Titan,

This is what you're hearing, right?

I coasted to a stop after shutting the engine off. After stopping, then hitting the brake pedal one more time, the pump started running, and will every time I hit the brake pedal after the car loses vacuum.

Yep. I just encountered a big vacuum issue so I'm still taking it in for a look. Does yours do it when you release the pedal also?

[jblackburn]

Only after the 2nd-3rd time after the engine is shut off. Otherwise, I imagine it only turns on if the turbo is boosting or at a COLD idle when there is no vacuum.

I don't hear it when normally idling and hitting the brakes. May be that the engine is louder than it, or that, like I believe, it's just not running when the engine is idling and providing enough vacuum for the booster.

[jblackburn]

Interesting note: the power steering still works for a brief few seconds as the car is coasting and the engine shuts off/is turned off. Perhaps until you actually get to a stop.

I thought that was cool.


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[titan2782]

Documentation says they checked it out and found it to be normal operation. But, I haven't heard it since I got the car back.