2007 Kia Rondo engine problems

Tl* the contact owns a 2007 kia rondo. The contact stated that while driving approximately 20 MPH, the temperature gauge reading increased into the red zone with a constant noise of flowing coolant. The engine was turned off. The contact inspected under the hood and noticed that the engine had overheated. After waiting two hours for the engine to cool, the vehicle was driven cautiously and taken to an authorized dealer for diagnosis where the radiator fan motor was replaced. The failure later recurred.

About 3 months after I purchased my kia rondo I noticed that every time I filled the tank there was a problem.for the last 5 years I have replaced a sensor every year to turn the check engine light of due to this problem. After putting gas in my tank all hell breaks loose. The tank begins to gargle the has the car revs high n then low until it shuts off and if I can get it on again it will rev high n low again while driving until it ahuta off in middle of road while driving.