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When it is blinking, it means that damage is being done to the converter. You smell fuel because it is running so rich. There is possibly a sensor the has gone bad and is telling the computer to add more fuel. There is so much going into the motor than it can burn it and some of the overflow is getting into the converter unburned. I am sure it is also getting into your oil. This can not only thin the oil but damage the lower end of the engine as the fuel acts a solvent, stopping the oil from being a lubricant. Get it checked out at an independent garage and get the oil changed at the same time-asap.

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Q: Why is check engine light blinking and it smells like gas when the car is on?
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