If you drive a 2004 Kia Optima and the engine cranks but won’t start, or it stalls unexpectedly while driving, the fuel pump relay is one of the first components...

The bottom line: If your 2004 Kia Optima cranks but won’t start, or if it stalls unexpectedly while driving, the fuel pump relay is often one of the first components...

The fuel pump on a 2004 Kia Optima is located inside the fuel tank, and you can access it through a service cover in the trunk behind the rear seats—without...