12. The new spark plug shown in the photograph above has been fouled. Which of the following is the most likely cause?
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Stuck open injector is the correct answer to this question.

Explanation:

The wet spark plug is the product of the injector stuck open. It can be observed in the exhaust system by the scent of petrol. It needs to be fixed quickly or the catalytic converter might be harmed.Another explanation may be that the engine is overloaded when you try to start the engine multiple times without firing it up. It happens frequently in winters.The signs of a fuel injector that is stuck-open or incompletely closed are very different from an injection system that is fully dead or moderately blocked up.Throughout this case, a scent of unburned fuel can be present in the passenger compartment, emanating through both the pipes, or out of the gas tank.