I HAVE A 2003 KIA OPTIMA I HAVE REPLACED FUEL AN FUEL RELAY IN STILL WANT CRANK WHATS THE PROBLEM?

normally this would be noticed by bad performance in the car in the way the engine acts when you push on the gas peddle normally a fuel pump needs two things to work the relay and the fuse if either two stops working you may notice decreased performance of the car's engine or that it refuses to run at all

What fault codes do you have?

There are so many cheap replacement fuel pumps being sold that are no good, I would use a test gauge to insure you have correct fuel pressure. If OK, there test for good spark at plugs and run compression test.

check fuel pump relay

how do i replace the fuel filther on a205 kia serento

i have the same problem i have adjusted the timing and also replaced the crank postion sensor and it wont stay running what could it be.

Try checking the distributor? Or does it have coils?

change the crank senser.If still want start change the coil pack.

it would be the cam sensor

use an ohm meter to make sure you have power going to the fuel pump.