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hot air under dash

This is a discussion on hot air under dash within the General Help forums, part of the LSx Technical Help Section category; is it just my car or is this normal, when driving for say at least 20 mins i start feeling ...

  1. #1
    I need some money huggerls1's Avatar
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    hugger orange
    1999 camaro ss

    hot air under dash

    is it just my car or is this normal, when driving for say at least 20 mins i start feeling the heat from the engine coming in from somewhere under the dash or something. anyone know what it could be or what i could do to stop it. i also am stock no headers so i dont know why im get this much heat coming in. especially since summer is coming

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    Veteran 0rion's Avatar
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    98 Formula
    06 duramax

    possibly the vent door to the heater core is stuck open. What happens when you move the temps around and go to vents and defrost or a/c? Does it ever change?

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    Member SSpdDmon's Avatar
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    SOM
    '01 Camaro SS

    The default position for the HVAC system is the defrost/floor setting. A small amount of air will still pass through the system - even while switched off. Try turning your temp knob to max cold and see if that helps some. If the system doesn't want to switch aiflow paths (ie vent to floor to defrost), then the small vacuum line on the back passenger side of the intake may have come loose or become damaged. But, I don't think that was the issue...

    Also, if you have long tube headers, you will notice a little more heat through the floorboards due to their design and location.

  4. #4
    I need some money huggerls1's Avatar
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    hugger orange
    1999 camaro ss

    no its doesnt change and right now my ac isnt working either so its always got hot ass air coming in, it was ok in the winter but its getting hot now

  5. #5
    Member SSpdDmon's Avatar
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    SOM
    '01 Camaro SS

    I'd check the connection on the small vacuum line on the back of the intake manifold. If it's not connected, not only will the HVAC system not switch between airflow paths, but you're also allowing unmetered air into the intake. That can cause idle issues and possibly create a lean condition.

    Regardless of whether the A/C is hooked up or if the blower fan is even running, I'd turn the temp knob to so it's all the way into the blue.

  6. #6
    Junior Member tbirdsc44's Avatar
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    1999 Camaro

    hugger; I also have a 1999 Camaro and notice the excessive heat. It really gets hot around my pedals on warm days. I'll have my vents on a cool setting and still notice the heat on my feet....

  7. #7
    Senior Member greatwhiteZ28's Avatar
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    wow is this the michigan thread

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