why wont my crown vic turn over?

im having the same prob with y 1984

It's rarely the fuel filter and more likely the fuel pump. Put a gauge on it and see. Most people assume that if they have pressure in the lines it must be ok - it must have a minimum of 40 PSI to run properly - that's a lot. Hang on to your wallet. If you're a DIY mechanic you'll have your hands full changing the Fuel Pump on the ground. You'll also need the fuel line disconnect tool and a good, tall set of jack stands to pick the car up and let the rear axle hang. There are 2 electrical connectors, the one directly above the tank can be accessed through the trunk but the other is a bear to thread properly. Just make sure to wire tie it out of harm's way. Unfortunately, you're looking at $300 - $500 at a reputable shop. I recommend a shop that displays an ASE Certified Technician's placard.