fuel filter???

:banghead: My friends 1989 Olds 88 is stalling and hesitating like its not getting any gas when it heats up. Is this a Dirty Fuel filter or a sensor??? If its the fuel filter where is it located under the under carrage on the fuel line or near the engine by the injector?:banghead:

Welcome to AF, many things can cause this, but start with a FF, under the l/s of the floor near the tank.