Why does my 2006 Chevy Colorado start so rough when its cold?

Big Steve

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I bought the truck used a few months ago. It has about 77,000 miles on it. It has a 2.8L I4 Engine. The engine cranks just fine but it starts so rough when its cold. Today has been the coldest day so far in NC (34 degrees). It almost reminds me of how a diesel motor starts in the cold. It eventually gets better as it warms up.

Any idea on why it does this?
 
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