have knockin problem help!!!! - Chevy Cobalt SS Forum : Chevrolet Cobalt SS Forums
 
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post #1 of 7 (permalink) Old 03-13-2011, 11:24 AM Thread Starter
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have knockin problem help!!!!

hi i have an 07 cobalt ss 2.0 supercharged with the gm stage 2 kit
have lots problems and now there is a big tickin noise or knock coming from motor runs fine just makin that noise pretty good can hear when drivein now its not doing any one know whats going on

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post #2 of 7 (permalink) Old 03-15-2011, 12:23 PM
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Is it LOUD knock or a tapping noise? Could be a slight bit of detonation.
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post #3 of 7 (permalink) Old 03-15-2011, 05:26 PM
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And does it do it when its cold, first start up or all the time?? My car does some knocking on first drive when its cold but once it starts to drive a bit, it goes away....

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post #4 of 7 (permalink) Old 03-15-2011, 05:49 PM Thread Starter
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Is it LOUD knock or a tapping noise? Could be a slight bit of detonation.
both warm and cold now its not but did for 2 days not to loud but enuff people could hear when drive by sounded more like a tickin loud or ya tappin
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post #5 of 7 (permalink) Old 03-16-2011, 08:09 AM
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If it comes and goes, could just be you ecm hasnt adjusted the timing yet too. Does it tap all the time or just sometimes? I have heard a little something like that off and on since the car was brand new. I think mine is a tiny bit of knock until the ecm adjusts.

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post #6 of 7 (permalink) Old 03-16-2011, 10:44 AM
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I don't know what it could be. To me it sounds like a lifter noise and that it regular for my car at least. Throw no codes, no problem bro!

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post #7 of 7 (permalink) Old 03-16-2011, 11:06 AM
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I don't know what it could be. To me it sounds like a lifter noise and that it regular for my car at least. Throw no codes, no problem bro!
I will agree with that
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