The fuel filter on a 1993 Cavalier is located and the rear of the vehicle on the passenger side. If you slide up underneath the car, you will see it coming off of the fuel tank. Hope that helps! It is located right behind the gas tank on the passenger side. That is if it is a z24
The MAP Sensor is on the back side of the engine, toward the top-middle. There should be a bracket w/ a hose coming out of the center. The MAP Sensor should be just to the left of the hose (Passenger Side).