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Depends if its leaking or not. If its leaking I don't think I would drive it your exhaust pipe gets VERY hot when driving even idling and if the gas gets onto the exhaust it could ignite. If its just not sending the proper amount of fuel to the engine I probably would drive it either because no tell how long the fuel pump will maintain pressure. But the worst that will happen is it will stop running and you will have to have to towed.

If the vehicle is over fueling, it can wash away the lubricant from the bores,

and dilute the oil in the sump.

That will cause the engine to seize.

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Q: Can driving in a car that has a faulty fuel system be harmful?
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