Advance problem in Kia Sephia 2000 Automatic

Hello everyone, I comment on my problem, I have a Kia Sephia 1.8 Automatic year 2000, approximately 1 week I was left without fuel since the score stopped working, I was trying to start a couple of times with the dry tank until I realized that it was fuel, I put 5 gallons and continued until I reached an inclined street the car began to head (walking to pull it up) Turn off and follow normal and in a period of 3 kilometers I fail 3 times, that is what happened to me.
Now, when I took it to change the gasoline pump I realized that the tank was full of sediment, it seemed mud or dirty water, they cleaned it but the fault remains the same, they also checked the air flow sensor and they say that he works well, I tell you that I have made a minor refined, (spark plugs, filters, girdle), it will be that the injectors were covered? I will appreciate your answers .....

It is what the most points, you are recommended to clean the injectors.

I will do it and I tell you the result, I will appreciate if someone else happened something similar and how I solve it.
Thank you!