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I think I know your exact problem cause a similar thing happened to my while dicking around in the driveway. I have an SR, but I know the KA has a similar setup. The ground switch signal that turns on the fuel pump coming out of your ecu might be no good anymore. On the SR ecu it is pin #104, it is called ground switch.
This signal is sent from the ecu to the fuel pump relay. On the KA wiring I believe it is a black wire pink strip and it goes to pin #3 on the green fuel pump, or egi pump, relay. I had all the same symptoms and found this to be bad.
All you have to do to test it is pull the relay. Take a volt meter that has the little diode symbol, basically is makes a noise if the wires are touching (used to check connectivity) put one meter prob in relay pin #3 the farthest one back, aka closed to the firewall, but do check, and the other prob to ground.
Set it to the connectivity check symbol and turn the key to acc. If you get a tone that the signal is good and I am wrong. If you get no signal. Than you need to replace your ecu.
Or do what I did. Wire up your own ground switch and have a manual fuel pump switch.
Good luck
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