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Originally Posted by terpsfan88
on morning i left my house and five minutes down the road my car started to smell like eggs, i think it might be somethings with exhaust but i dont really know. i have a 93 super coupe and any help would be appreciated. thanks.
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The "rotten egg" sulfur smell is usually generated by high temperatures in the catalytic converter caused by excess unburned fuel going through the exhaust. The converter oxidizes this fuel, which generates the heat, and the high heat generates the smell.
An occasional whiff of this smell upon start-up or momentarily at idle isn't necessarily a problem. In fact, it indicates the catalytic converter is doing its job in preventing unburned fuel vapors from reaching the atmosphere. But of course, the concern is what's causing the higher percentage of unburned fuel from the engine.
I'd have a shop or the dealer plug in a scan tool and check the PCM -- powertrain control module -- for fault codes or a false signal from the coolant sensor, or evidence that the thermostat might not be allowing the engine to reach full operating temperature.
Hope this helps.