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Other than a leak. It could be that you need new spark plugs, because it is not enough spark to burn the full mixture, or re-gap them. Also , check your TPS (throttle position sensor.

If you mean gas and not petrol.

It's more than likely the catalytic converter At Fault.

It can smell of gas or rotten eggs.

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12y ago
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Q: Why does your Nissan smell like gas?
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