2001 f150 4x4 5.4 205k

This truck is not my daily driver but I use it about once or twice a week. Last night I drove it to the store and it ran great. As good as ever.

This morning it won't start. It cranks and the battery is strong but no bang. It was cold. Just below freezing for the first time this year.

No blown fuses where would you start?

 

And your asking us to guess why?
What is the Theft light doing?
Often a sudden no start involves the Theft system called PATS.
Maybe the truck is angry due to the lack of attention.
We really need a place to start on this.
Good luck.

 

Sorry I didn't have much info to start with. Just trying to start a little brain storming.

It fires with starter fluid so I have spark.

Zero pressure when priming

Relay clicks but changed it just to check.

Now the theft light... It still blinks after unlocking the doors with the remote and it lights up when I try to start the engine. I only have one key.

 

Your THEFT light is normal. Better get a second (or third) key before you have an emergency.

I'd go with a frozen fuel line as the prime suspect although it's pretty rare for fuel injected systems to freeze up. Once you have some temps above freezing for a bit, see if it will then start. Alcohol in fuels tends to draw moisture which then can freeze. If so, add some gas antifreeze like Heet or similar.

 

I did add some Heet it's also been above freezing for a few days. It's 65 now.

 

Well if that hasn't defrosted it , then it's not a frozen fuel line.

Check the operation of the fuel pump.

 

Is there pressure at the shrader valve on the fuel rail?

 

No pressure at all. I just disconnected the tank side of the filter and turned the key. Not a drop came out. I hear the same sounds when it should be priming but nothing comes out. I need someone to help me turn the key while listen to the gas tank but I don't think it's doing anything.

I checked the inertia switch, it is not not popped out. Haven't checked the voltage though. I'll try that tomorrow. Is there a way to check voltage at the pump connections without dropping the tank?

 

Yeah ...if nothing came out then it is not pumping. If the relay is good and all fuses and the inertia switch are good, my test would be to pull the connection at the pump and test the hot wire with the key on and the key off. If it has no power with the key on, then the problem is not the pump. If it has power with the key on, then it must be the pump. I would have to look at a schematic to see what wire that is. The smarter guys may know how to test it under the hood at the relay socket....or maybe the book has a procedure (if you have one). I can check the book later if you want or hopefully someone else can chime in.

 

It's fairly easy to check the pump power at the inertia switch. That will half-split the circuit.

Keep in mind the pump only runs a very brief (~2 seconds) interval when the ignition switch is first turned to RUN from OFF

 

Be sure to check the FPDM.

 

Can't. His truck doesn't have one.

 

It was the fuel pump. Changed it out and the truck runs like new.

I do wander what made it quit when it did.

 

Be sure you have a nice new clean fuel filter. Yeas ago our son got a crappy tank of gas. The fuel filter got plugged but it would still run somewhat. By the end of that tank the pump finally gave out trying to push gas thru that almost totally plugged filter. Glad you got it running...