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Old Jan 23, 2011 | 03:10 PM
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Default Intake help
What is the small vacum line for that comes out of the back of the intake? This is for an ls3 intake if that matters?
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Old Jan 23, 2011 | 03:23 PM
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Not sure if its different from an ls1 but there is 4 things that get connected to the back of the intake. One of them is the big hose that gets connected to your brake booster. Second is an electrical connection for your map sensor. Now the two vacuum lines are one for the air system and one for the hvac system.
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Old Jan 23, 2011 | 03:26 PM
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So if the one for hvac isnt hooked what will not work?
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Old Jan 23, 2011 | 03:31 PM
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It needs to be hooked up or you will have a vacuum leak. The hvac system is heating ventilation air conditioning system. It needs to be hooked up or capped off.
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Old Jan 23, 2011 | 03:37 PM
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yea I know what hvac is. I guess my question is what does it control on the hvac system I thought that hvac was controled by electronics. Or where does the line need to go off the back of the intake my car had a small fire and im tryin to put it back together?
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Old Jan 23, 2011 | 05:38 PM
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i believe that vacuum line controls the flapper on the HVAC
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Old Jan 23, 2011 | 06:09 PM
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So if the line is not connected will it remain open or close and were does it connect on the car?
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Old Jan 23, 2011 | 06:31 PM
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Originally Posted by CyaPussy
yea I know what hvac is. I guess my question is what does it control on the hvac system I thought that hvac was controled by electronics. Or where does the line need to go off the back of the intake my car had a small fire and im tryin to put it back together?


it controls the door on the hvac.... so it will be full defrost if left unhooked.
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Old Jan 23, 2011 | 06:55 PM
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Got ya does it connect near were the coolant lines go into the heater like I said my car had a fire most stuff was burned.
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