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Re: OK, what did I brake?
The sound you heard is actual vacuum from the engine from the engine intake system.
That 1/8" plastic line is the accessory vacuum line that feeds the HVAC system a vacuum source to control vents and airflow. The source is the Y connector on the backside of the upper intake manifold plenum and it feeds into the firewall with the main wiring harness to the cabin and the vacuum distribution block under the dash by the blower motor.
It is best to get it repaired properly.
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