2000 expedition take long to start and sometimes won’t start at all

[milton]

I have a 2000 expedition 5.4 put every single sensor new spark plugs coils fuel pump fuel filter injectors and my trucks starts when ever it feels like then when finally starts it starts with a crazy misfire also no codes don’t no what else to do please help been messing with this thing for two years no one now’s what’s wrong with it

 

[Billme]

I would be looking at the fuel system all the way to the pump.. Check your fuel rail pressure..
Use short burst for starting instead of long … You may have a fuel pump relay becoming weak lagging

 

[milton]

I put new fuel rail pump filter injectors and nothing

 

[Hamfisted]

Put a fuel pressure gauge on the fuel rail schrader fitting and watch you fuel pressure during startup and cranking. You should see 40-50 psi at the rail. If it's a new fuel pump and you're still not seeing that pressure at the rail, connect a multimeter to the fuel pump's power wire and see what what kind of voltage you're getting there.


OTC Fuel Pressure Test Kit on Amazon






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[1955moose]

Milton, I had my SUV stop starting completely out of the blue. Just as a fluke, I switched the fuel pump relay with the one next to it, in main fuse box under hood. Your problem is probably more severe, but worth a try. It won't cost you a dime. You've changed out so many items, did you do a compression test, to eliminate a failing valve, or piston. If you're from a wet climate, you might have corrosion in one of the plugs that triggers the injectors or pump. Rust and corrosion can cause wonky things on vehicles.