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what is this for???? Under driver side headlight

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Old Sep 18, 2011 | 11:55 PM
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Default what is this for???? Under driver side headlight

What is this for and what's it called? It's a black cylinder looking majigee that has 2 heater like hose attached to it one going to the intake plenum and the other going to the back side of the intake manifold. Thanks.
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Old Sep 18, 2011 | 11:58 PM
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Is this on your Firebird?

A pic would be helpful.
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Old Sep 19, 2011 | 12:00 AM
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smog pump..
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Old Sep 19, 2011 | 12:06 AM
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It's the air pump for the catalytic converters
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Old Sep 19, 2011 | 12:15 AM
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is it that deal that whines for a few seconds when you start it up? I thought it was a smog pump... or the AIR system..
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Old Sep 19, 2011 | 10:20 AM
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Air system, i think it heats up the cats faster so they perform better on cold starts. Someone correct me if im wrong.
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Old Sep 19, 2011 | 10:48 AM
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It doesn't heat up the air. It just pumps fresh air into it until the car is up to temp
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Old Sep 19, 2011 | 11:00 AM
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Originally Posted by babbage1109
It doesn't heat up the air. It just pumps fresh air into it until the car is up to temp
Thank you sir.
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Old Sep 19, 2011 | 11:40 AM
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The fresh o2 injected into the cats during cold startup (due to excess fuel req'd to facilitate cold start) enables the cats to "light off" faster and clean up the exhaust sooner instead of waiting for them to heat up unassisted. Once there is enough heat in them, the air pump shuts off.
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Old Oct 7, 2011 | 09:06 PM
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So it helps heat up the cats faster, not buy direct heat transfer itself but buy helping them " light off " faster.
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Old Oct 7, 2011 | 10:37 PM
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^ From what I've read, yes.
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