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Old 09-07-2012, 12:06 PM   #1
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exhaust type noise on startup

In cold weather, my 2008 Focus is very loud on startup , idles fast, then quiets down after a couple minutes. Its been fine all summer, but the colder weather is approaching. Any ideas?


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Old 09-07-2012, 12:13 PM   #2
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choke is open when you have a cold atart, I get that with my 2007, BUT since I have a CAI its even louder..
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Old 09-07-2012, 07:28 PM   #3
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Same here. Cossie CAI. Start it up, idles up to about 2100....comes back down after a few minutes. Pretty dang loud (through the CAI)
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Old 09-12-2012, 11:28 AM   #4
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My 2010 does the same thing. It is even louder and more prominant with my fswerks cai, header, and no-cat exhaust
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Old 09-13-2012, 08:50 AM   #5
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Emissions cars do this; they idle ridiculously fast when cold to warm up the catalysts.
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