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Re: 89' Buick Century Fuel Problems?
Welcome to AF!!
Unfortunately, I don't have any pictures but I will try to explain. The fuel pump in your car is located inside the fuel tank in the rear of the car. It is an electric pump and they often go bad if you have high mileage or just given the age of your car it is possible. By reading your post you indicate that the car will run if you spray ether into the engine. This indicates that there is spark and that the engine is otherwise in good shape.
The fuel pump is controlled by a relay that is located in the power control center under the hood. The relay should be marked and can be replaced simply by pulling the old relay out and replacing it with a new one. If the relay is bad the pump should turn on when you try to start the car and it should run. I would change the relay first as it is the cheapest and easiest thing to do.
Since the fuel pump is located in the fuel tank you may have to drop the tank down from the car to get it out. On some models there is an access plate in the trunk. You can pull up the carpet to check.
I suggest if you aren't mechanically inclined that you have a mechanic do the repair. One other thing is to make sure that the fuel filter is replaced. A plugged filter can overtax the fuel pump and cause premature failure.
I hope this helps explain the system and what needs to be done to repair it.
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