Is it safe to drive with a blown out spark plug?

Would it be ok to drive 1999 ford expedition with a blown out spark plug, just a short distance with speed not exceeding 25 mph.

All I had to do was read your first sentence: It happens to Ford discontinued engines every day! Haul the car to where someone changes the cylinder head. More than likely it will have to be a Ford Dealership.

Not sure what you mean by blown out. If you mean that you know for a fact that there's nothing inside the cylinder then yeah i would do it if it wasn't to far. Speed shouldnt matter. Its not going to explode. What could be bad if you have bits of a spark plug that fell inside the cylinder… Dunno how that could happen but you say blown out and you have eyes on it so that is your call.--If you do it unplug the injector so you are not pushing fuel that won't be used back into the exhaust/out plug hole etc etc. You also don't want all that fuel washing down you cyl walls either.--just my 2 cents in the end its your auto, your choice.

I don't think it would be very safe at all. If its a short distance, just walk.

Where do you think the piston is going to push the air fuel mixture? How about right under your hood. And how about all the dirt that'll get sucked in during the intake stroke?

So drive it if you want to destroy the engine or start a fire. Tow it. It'll be the best $100 you ever spent.

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