Pontiac Bonneville 2000 ssei runs rough on start up then shuts off?

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ann

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It has 103,000 miles on it. The weather is cold .When I start it up it runs real rough, then you smell some fumes, and then it shuts off. Does anyone know what is wrong? It shuts off then doesn't start back up for awhile. It is also has white smoke coming from tailpipe.
It was steam because its moist and the tail pipe has black residue around it.It also has a strong chemical smell. not gas. and the antifreeze is brownish in the antifreeze tank.. Thank you all for suggestions.
 
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