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knockin noise....what is it?

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Old May 30, 2007 | 10:37 PM
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06_cobalt_SS
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From: Nashville, TN
knockin noise....what is it?
it doesnt happen all the time but when i start my car or sometimes when i just pull up to a red light i get this weird rattle kinda knockin noise comin from the engine bay. i have no clue what it is. the car doesnt idle hard or anything just a weird noise. anyone have any clue on what it is.....i do have the stage 2 but that is it. PEACE!
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Old May 30, 2007 | 10:38 PM
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From: Royersford, PA
purge valve for the gas tank
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Old May 30, 2007 | 11:36 PM
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From: cherry hill nj
yeah i here the same thing?? not bad right??
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Old May 31, 2007 | 12:02 AM
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Evil trunk monkey.Knocks five times when I least expect it
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Old May 31, 2007 | 12:07 AM
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From: cherry hill nj
haha ok...?
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Old May 31, 2007 | 12:16 AM
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Not to be a dick, but there are actually quite a few threads about this.

It has to do with Emissions.
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Old May 31, 2007 | 08:58 AM
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From: cherry hill nj
Originally Posted by 1gmfanatik
Not to be a dick, but there are actually quite a few threads about this.

It has to do with Emissions.

sorry bro... new to the site.. ill search it now
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