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smelly exhaust
Oxygen sensor does not affect exhaust smell since it's job is to detect oxygen in the exhaust (oxygen is odorless!). Its signal in form of a voltage ranging from 0.1 to 0.95volts directs the DME to dial back on fuel injection to achieve perfect ratio of about 14:1 air: fuel for burning under all load conditions. The bad smell like rotten eggs coming from most exhausts is due to poor quality high sulfur fuel being sold in your gas station and a poisoned catalytic converter. Change the gas and maybe the smell will go away. Changing the O2 sensor will be helpful for maintaining good fuel economy and good running of the engine as well as keep pollution within specs.
Tom
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