93 grand cheroke will not start. The engine turns over.Changed fuel pump,stop and fuel relay,cc postion sensor?

Changed fuel pump, fuel pump relay and stop relay, crankcase position sensor, distributor rotor and cap,spark plugs and wires. I took cap off of fuel pump relay and pushed in contacts and fuel pump comes on but when I go to start by turning the key, the starter cranks but the fuel pump will not come on. The experts say its the crankcase position sensor but I replaced this also.|||if you can hear the fuel pump running then maybe the fuel filter is stopping the fuel from reaching the engine. how is the spark? do you have good spark at the plugs? it might be the coil or module if you have no spark. if you have fuel reaching the engine then it,s got to be spark.|||Ignition switch trust me its very common and cost less than $20 dollars.