I have a 2003 expedition.about a month ago it quit goin down the road and we put a fuel pump and a cam sensor in it and it ran .yesterday it quit again I put another new pump and can sensor but it won’t crank.the security light is blinking real fast I don’t know what that means

Does it have spark to the plugs ?

and the secret vehicle is?

needs tune up -fuel filter (its external)--fuel pump-check crank sensor /cam sensor --egr valve -cat converter

could be crankshaft sensor or fuel filter,check air filter.

2 items that will put you back on the road. The glow plug controller When you turn the key on do you hear it. Its on the left rear of the engine above the rocker cover to the left of the turbo charger the glow plus is a assistant to aid in starting, There are two type of controller its either a rely or a solid state, Cycle the key it should come on for 2 seconds. cycle the key again. then start it,if it start get a glow plug control.now if it doesnt start are you willing to use either(its called instant start) use the one for diesel. did it start and stay running. if it stays running glow plug control is needed. Now if it didnt stay running and shuts right of youll need to replace the cam sensor, the cam sensor is located in the right side of timing cover behind the water pump pulley. They are plaque with damage. inspect the cam sensor and the connector for damages, If the camsensor rattles its defective. This cam sensor are failing left and right oh by the way carry an extra one the are common failures

i would test the fuel transfer pump next.

Sounds like a bad computer>

REPLACE FUEL FILTER THEN FUEL PUMP

I would check the cam and crank position sensor, these are definitely the symptoms of a bad crank sensor.

there is no fuel pump cut off switch on this car, it is possible the fuel pump module was damaged from this accident, u will have to have the fuel pump circuit tested for faults before replacing the pump, don't guess, this is an expensive repair