Hi: My truck {F250 4x2 2001 V10 triton} always has run good-- but I left it sitting for 2 weeks in the hot sun. now it just wont start ? the motor turns over fine but it just wont fire up--- it sounds dry--no gas smell, no smoke, like there’s no gas getting to the motor. I have half a tank of gas, oil pressure looks ok, fuses look ok, but one fuse has a metal jacket so I don’t know, battery seems ok --what’s wrong ? could it be electrical ? A loose wire ? how can I tell, or is it a clogged fuel line? fuel filter? or dead fuel pump ? Dose the pump need to be primed somehow ? --how do I check all that out ? I don’t want to tow it to a shop if I can fix it in the drive way, any suggestions would be much appreciated thanks.

 

Check the inertia fuel pump shut off[i think thats the name] the deal that shuts the fuel off if the truck gets hit hard, maybe someone hit it and you dont know it,although you have to hit it pretty hard to make it shut off.Check the manual, i dont know where it is.Fuse # 19 is the fuel pump- under the hood.i leave mine for 2 weeks at a time,that should just be a coincidence.good luck, let us know what it is.

 

Yeah someone could have backed into it and kicked the switch.

 

Hi: I did check the inertia fuel pump switch and it looks ok
I looked at fuse #19,5,7 in the power distribution box and they look ok I also un-hooked the positive terminal from the battery and waited five minutes then reconnected it I thought this might
re- boot some computer module-- didn't help.
any other ideas I can try ?

 

Do you have pressure on the rails? You might want to turn the key ON and OFF a few times (5 or 6 seconds each time) to allow the pressure to build back up. Sitting 2 weeks should not have caused a loss of pressure, but maybe.
Also did you hear the fuel pump humming?

 

I did as you suggested but no luck-- I do not hear any kind of humming only a half second long, kind of grinding sound- I don't know what that sound is but I think it is normal.

 

I am all out of suggestions right now. If you have pressure at the rails, the fuel pump is humming (you might have to let someone else turn the key on while you listen underneath the truck) and you have spark...have you checked that? ...then I'll have to mull over it a little while to come up with something else.

 

How should I check for spark ? what is the best way to check so that I wont damage the electronics ?
is there a simple way to check the fuel line pressure ?
is the fuel pump inside the gas tank--can I find the positive and ground wires to the fuel pump--if the fuel pump is dead then I will have to give up trying to fix it myself.

 

Turn the key on then press the Schrader valve on the fuel rail (valve stem) cover you eyes! If you have PSI fuel will spray out. Now press and hold it until all PSI is released then have some one turn the key on as you listen by the tank. If you do not hear the fuel pump run for a second or 2 then it is not working. It should cycle when the key is turned on.
To test spark? I don’t want to go there because of the coil on plug. If you do not have the proper resistance than you can burn the coil so you need a tester.

 

Got this from Chilton's:
Check all hoses and lines for kinks and leaking. Repair as necessary.
Check all electrical connections for looseness and corrosion. Repair as necessary.
Turn the ignition key from the OFF position to the RUN position several times (do not start the engine) and verify that the pump runs briefly each time, (you will here a low humming sound from the fuel tank).
Check that the inertia switch is reset before diagnosing power supply problems to the fuel pump.

The use of a scan tool is required to perform these tests.

Turn the ignition key OFF.
Connect a suitable fuel pressure gauge to the fuel test port (Schrader valve) on the fuel rail.
Connect the scan tool and turn the ignition key ON but do not start the engine.
Following the scan tool manufacturer's instructions, enter the output test mode and run the fuel pump to obtain the maximum fuel pressure.
The fuel pressure should be between 30-45 psi (210-310 kPa).
If the fuel pressure is within specification the pump is working properly. If not, continue with the test.
Check the pump ground connection and service as necessary.
Turn the ignition key ON.
Using the scan tool, enter output test mode and turn on the fuel pump circuit.
Using a Digital Volt Ohmmeter (DVOM), check for voltage (approximately 10.5 volts) at the fuel pump electrical connector.
If the pump is getting a good voltage supply, the ground connection is good and the fuel pressure is not within specification, then replace the pump.

 

Hi: I checked the fuel PSI at the Schrader valve and there was no gas at all. I then listened for the sound of the fuel pump at the gas tank and there was no sound there at all.
the wiring is not simple 4 wires and what I believe is a large common grounding block on the fire wall, is not easily accessible--with dozens of wires. so I am giving up. thanks for all the advice. I am going to let a mechanic figure it out.

 

Let us know what you find!!!

 

Did you try the fuel pump relay? Not sure where it is on the new trucks. If it's bad the pump won't work. Brian

 

I have the same problem, my 2000 F250 will not start when it is hot outside and sits in the sun. Have taken it to the dealer they told me it did not code. I hate dealers, they are no longer mechanics but just code readers. I have been told to replace my idle control valve does this make sence?

Mike

 

code readers and parts changers!
They are like doctors now. Try this and see if it works, 50 bucks, did not work try this see if it works, 50 buck, until you go to another and start over.