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Old 01-29-2010, 01:29 AM   #9
Eurostyle
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Join Date: Feb 2002
Location: Milton
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Quote:
Originally Posted by nachos23 View Post
actually it's other function is to help heat up the catalytic converter to operating temp more quickly. By restricting exhaust gases, system heats up more quickly. Cold catalytic converters emit more CO2. That's where the eTest might be a concern. If car left cool down before test, it will emit higher CO2 readings (as I understand) until it reaches operating temp.
All etests are done at normal operating temp tho!
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