05 expedition cranks but doesnt start

[Manofmanyfords]

i have replaced the fuel pump and fuel pump driver still no luck what now?

 

[stamp11127]

One of the three main ingredients is missing:
1) Fuel
2) Spark
3) Air - compression

What is the fuel pressure?
Do you have spark?
We will assume it has compression and air since we are still breathing and aren't dead.
Been a long day in the land of the ********....

 

[Manofmanyfords]

have spark and everything the fuel pump is still not pressurizing or even turning on at all for some reason

 

[ExpeditionAndy]

have spark and everything the fuel pump is still not pressurizing or even turning on at all for some reason

Check the inertia switch in the back on the left side of the hatch. I think you have to press down on the top to reset it.

It's in the little compartment with the quarter turn fastener.

 

[bedrck46]

wiring diagram

 

[bedrck46]

what was the reason that you changed the fuel pump and driver

 

[Manofmanyfords]

i changed the driver cuase it had a whole corroded in it and i thought the fuel pump went bad cause it wasnt priming or coming on at all but today i straight wired the fuel pump from the battery and it fired right up and i checked the inertia switch it wasnt tripped any help will be aprreciated it belongs to a single mother of four i go to church with and would love to get it back to asap thanks

 

[GotExhaust.com]

i changed the driver cuase it had a whole corroded in it and i thought the fuel pump went bad cause it wasnt priming or coming on at all but today i straight wired the fuel pump from the battery and it fired right up and i checked the inertia switch it wasnt tripped any help will be aprreciated it belongs to a single mother of four i go to church with and would love to get it back to asap thanks

Did you check the fuel pump relay? Start by swapping it out with another that you know works. You obviously aren't getting power to the fuel pump so start tracing the power loss back. Could be a loose ground? Fuse? Relay? Broken wire? Aren't electrical problems fun! Good luck my friend.

 

[Manofmanyfords]

okay so i have checked all the fuses and the relay is internlly built into the fuse box it is non serviceable unless you replace the whole fusebox i dont know about a loose ground or broken wire not an electrical guy really

 

[toms89]

I didn't see it mentioned. Is your theft light blinking rapidly?

Pats will allow it to crank but it will not start if its activated.

 

[Manofmanyfords]

i dont believe so but i will check to tommorrow

 

[Manofmanyfords]

i dont think it is but will check tommorrow

 

[bedrck46]

check all connectors associated with the components that you changed. Also check to see if you are getting voltage out of the drivers module to the fuel pump. And also check to see if you are getting voltage in to the drivers module.

 

[Manofmanyfords]

the security light is not flashing
fast

 

[stamp11127]

Fuel pump relay is in the central junction box. I'd be very surprised if the relays were not interchangeable. Pull on it and see if it comes out. Worse case is you'll pull the cover off.

Do you have a test light or dvm?

 

[Manofmanyfords]

you cant just replace the relay you have to replace the whole fuse boox which I ordered today for like 300 bucks I was messing with the fuse box today and hit the key and it fired right up this so confused don't know what to do ugh

 

[metaldrgn]

Check the resistance through the fuel pump to gnd.

 

[Manofmanyfords]

Ok guys so I got it fixed tonight I finally broke down and order the fuse box assembly from ford and installed it in about 20 minutes and has fired up perfectly ever since thanks for all the help and advice guys wish I would have tried that twentie minute fix first but anyway twenty hours later we are up and going

 

[stamp11127]

If you can please post a pic of the old fuse box. I'm curious as to how much they have integrated the systems.

 

[keithnra]

I am glad u got it goin