I have been having some problems recently with my Expedition.
So far the fuel pump, raidiator, alternator, and a spark plug have been replaced within 8 so months and I am in the process of changing the oil gasket from the pan to stop a leak.

I have drove the vehicle to the mountains 2 months ago with no problems. Now after returning from a 4 hour drive to visit the family, my truck stalled on the road 30 minutes from home. I check the oil level and it was low so I refilled it and was able to drive home with no problems. During new years eve the truck stalled again, and now can't get a city block without another stall. I had to get it towed and is now sitting in my driveway.

I will have the oil gasket and filter replaced tomorrow, but I'm thinking this is not the cause to the stall.

It seems to sputter, rought idle, and eventually stall completly in the drive way when I start it up. Does anyone have any ideas as to what could be the cause?

Ford Expedition 2003
V8, 4.6 Liter
4x4

Check engine light and oil light come one, but no codes show

 

It's a bad crank sensor or a failing fuel pump. Start by testing the fuel pressure and from the result you'll know which one is the problem.

 

thanks for your help! I was not able to work on the truck today, but I'll see what I can find out tomorrow.

 

alright so I managed to take a look at the engine and I could not find any problems, I couldn't get the oil gasket changed so I did an oil change. I don't have the tool to diagnose the fuel pressure, so while I was changing the oil I disconnected the battery.

After the oil change I was able to start my truck and it ran just fine idling. I took it around the block a few times and at about 10 minutes in the truck stalled again, with my oil pressure gauge going down to 0 and the check engine light on. No error codes still.

I disconnected the battery and waited for the power to drain. After reconnecting the battery I was able to reproduce the stall after going around the block again. No codes, and the oil pressure gauge went down to zero again.

I was not able to change the gasket because of the bolts being so tight, and not being able to get proper leverage. I can see that it is leaking a little more than before by where the oil pan gasket is located.

After I return from work I'll get the truck up on some ramps and get that gasket changed to see if that solves the problem.

Could this still be caused from something else?

 

Can we assume the oil pressure gauge went to zero and the CEL came on after the engine stalled?

 

The check engine light came on the same time as the oil gauge went to zero.

 

That didn't answer my question.

 

the oil pressure gauge slowly started to drop at the same time the engine started to stall. I cant be exactly sure, but I remember it all happening at the same time.

 

Are you using the OEM oil pressure fake gauge in the instrument cluster? Or have you added a real aftermarket oil pressure gauge? If you're using the OEM one, then this is not really an oil pressure gauge no more than a red low oil pressure lamp in any other car is one. There is no oil pressure sender installed from factory by Ford, only a standard on/off switch. It tells the gauge in the cluster to either read "normal" or "low" and nothing in between. If yours is falling slowly while engine is stalling, I'd actually suspect the main ground to the engine or something along those lines. I am assuming that the vehicle is not acting as if the voltage is dropping and lights are dimming out.

 

Okay, that is all normal.

 

It is the generic oil gauge i made no modification. I do not experience any power drain on any of the electronics in the vehicle. The gauge will either be in the normal range or completely drop to 0. I meant to say the gauge would
fluctuateasstarts to stall.

 

Ok, it's normal that the engine will loose oil pressure when it stalls, as it will also stop the oil pump obviously. It would though be abnormal if the OEM gauge slowly falls.

 

Ok, so I've fully replaced the oil gasket and can confirm there are no more leaks. Afterwards I was able to start my truckand drive it around fully! The next day it stalled at a train crossing, as I was ideling for about 5 minutes. After about 5 minutes I was able to restart the truck and drive it around for about 3 days now with no problems. It seems like the pressure and timing was off...

 

Sounds like an overheating component issue. With normal driving the air movement keeps things cool, but just sitting there allowed the offending part to get warm enough to fail until it cooled back down.

 

First, I have an 04 expedition 5.4 and had the same issues. I had no check engine light for several months with sputter, rough idle, stalling and trans shifting early. After several months the check engine light came on and stalling was progressively worse. I was praying for the CEL. Anyway, after retrieving codes, the codes were PO231, PO171, PO174. The PO231 is a secondary fuel pump low voltage. This relay is not serviceable and Fuse Box Assembly has to be replaced. I replaced this part ($335) about 5,000 miles ago, truck runs a lot better and no more stalling issues. Hope this helps...