Replaced fuel pump and now fuel gauge on dash does not work on 2000 kia sephia? All other gauges on dash work. Is there a reset button or a specific fuse?

Look in the fuel pump/filter area?

The fuel filter for a 2000 KIA Sephia is under the right side of the vehicle, just forward of the rear suspension trailing arm.----------------------------------------------------------------------------------
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Broken timing belt?

HAVENT SEEN VERY MANY PROBLEMS WITH THE FUEL PUMPS ON THESE PARTICULAR VEHICLE . YOU CAN TAKE THE 02 SENSOR OUT AND CHECK BACKPRESSURE WITH A GAUGE OR YOU CAN TAKE THE CONVERTER DOWN JUST 4 NUTS AND SEE IF YOUR ACCELERATION IMPROVES . BUT YES A CAT CONVERTER CAN CAUSE A VEHICLE TO BE SLOW TO ACCELERATE AND KEEP IT FROM GOING TO HIGH SPEEDS DUE TO THE BACKPRESSURE ON THE ENGINE . IF YOU TAKE IT TO A MUFFLER SHOP IT SHOULD RUN ABOUT 200.00 TO REPLACE WITH AN AFTERMARKET . IF YOU HAVE A PO420 IN THE COMPUTER FOR CHECK ENGINE LIGHT THAT IS THE LIKELY CAUSE THIS VEHICLE HAS 2 CATS A WARM UP CAT AND A MAIN CAT IT COULD BE EITHER OR BOTH .

Removal & Installation

1. Relieve the fuel system pressure.
   
2. Disconnect the negative battery cable.
   
3. Remove the rear seat cushion from the vehicle.
   
4. Clean any dirt that has accumulated around the fuel pump cover so it will not enter the tank during pump removal and installation.
   
5. Remove the fuel pump cover.
   
6. Disconnect the fuel gauge connector, hoses, and the gauge.
   
7. Disconnect the fuel pump electrical connector.
   
8. Remove the fuel pump from the bracket assembly.
   
9. Remove the seal ring and discard.
   

To install:

1. Clean the fuel pump mounting flange, fuel tank mounting surface and seal ring groove.
   
2. Apply a light coating of grease on a new seal ring to hold it in place during assembly.
   
3. Install the seal ring.
   
4. Install the fuel pump to the bracket assembly carefully to ensure the filter is not damaged. Be sure the seal ring remains in the groove.
   
5. Hold the pump assembly in place, and pull the fuel pump down so that it is tight against the bracket.
   
6. Connect the fuel pump electrical connector.
   
7. Connect the fuel gauge, hoses, and gauge connector.
   
8. Install the fuel pump cover.
   
9. Install the rear seat cushion.
   
10. Connect the negative battery cable.
    
11. Start the engine and check for proper system operation and for fuel leaks.
    

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If there is a access panel under the seat ,then u replace the pump through that, when u remove the pump and replace it with the new one BE CAREFUL NOT TO BEND THE GAUGE FLOAT ROD if u do your fuel gauge will be wrong. you have to lift and then turn at a angle and reverse to put the new pump in.

check all fuel lines, make sure there is no leaks

To remove the Gas tank on a 1994 kia sephia, you would have to remove the back seat. Be careful to unfasten the two clips at the lover part of the seat in order to remove it.

remember to disconnect the battery so you wont have any chances of sparkles while handling the fuel pump.

In this 1994 kia sephia model it is not necessary to drop the fuel tank to service the fuel pump.

I had previously replaced the failing fuel pump on my '98 K2500 when it went out entirely. I was ready to replace my 2000 K3500's fuel gauge as it was acting up.
When I started the engine, the gauge would bounce from the middle to way past full then back. It would also jump sporadically while driving on level ground.
I checked the electrical connections at the tank and made sure the frame ground strap located nearby was making good contact. Nothing changed until I removed the instrument panel and cleaned the connections on the back. The fuel gauge seems to be operating correctly now.
There are videos on YouTube that show how to remove the instrument cluster if in doubt. Mine dash has a pop-in plastic bezel followed by 4 screws to hold the cluster in place. It took about a half hour to inspect & clean the dash connection vs. $250 to replace the pump/sending unit combo. Hope this helps.

your float is stuck on the fuel pump