Smog Pump/Air Pump Whine Noise
12-10-2004, 12:14 PM
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Smog Pump/Air Pump Whine Noise I have a 98 LS1 and recently noticed a whining noise when the air pump comes on. It does it only after I have driven it, let it set, then start it up again. Took it to the chevy dealer and they indicated that it's within specifications. There's no SES light. Any thoughts? Perhaps it's something else?
12-10-2004, 12:38 PM
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quite normal. a search will reveal many threads about this very topic.
the smog pump is activated on cold starts. it's purpose is to inject fresh air into the exhuast system to aid the catalyst in lighting off faster thus reducing harmful emmisions.
the smog pump is activated on cold starts. it's purpose is to inject fresh air into the exhuast system to aid the catalyst in lighting off faster thus reducing harmful emmisions.
Oh well, I'm yanking it out when I throw the G5X3 in 
12-10-2004, 12:55 PM
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Originally Posted by TAQuickness
quite normal. a search will reveal many threads about this very topic.
the smog pump is activated on cold starts. it's purpose is to inject fresh air into the exhuast system to aid the catalyst in lighting off faster thus reducing harmful emmisions.
the smog pump is activated on cold starts. it's purpose is to inject fresh air into the exhuast system to aid the catalyst in lighting off faster thus reducing harmful emmisions.
