Hi there,
Normally no, what colour is the smoke? I think that you would have known that the car was smoking before the converter was installed, so if it was not I would go back to the dealer and complain, and if that dose not work go to Nissan customer care and lodge a complaint against the dealer, this will get there attention.
Mark (mhpautos)
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Thursday, September 24th, 2009 AT 2:39 AM