Okay I'm not much in the field of mechanics I've had my truck in the shop for almost a month now, and they still can't figure out why the truck goes into a limp mode after a few minutes, there are no codes we have replaced the the ecm the fuel pump fuel filter non of it fixed it, you can stop restart it and it will go again with no problem then it happens again after a little bit, any suggestions?

 

What is done many times is to monitor different functions and see which are incorrect or misleading..

Since we cannot do that here, we have to rely on every bit of info you can provide..

Now since you know when it is or has gone into limp mode, what were you doing ?
Cruising,picking up speed, how fast, turning a corner , backing up ? By this time you very likely have some idea of when this happens and what the conditions are that contribute to this taking place.
A capable scan tool could provide this data stream info , and we then examine what is taking place.
Want to give this a shot ?
Don't be afraid to get lengthy because the more info you can provide the better, thanks.

 

I will have to try that this weekend with the scan tool, it's not a consistent just picking up speed or crusing thing I wish it was, I could be driving it for 30 min and it will do it, the next time 5 min and the speed isn't a variable either, it doesn't matter how fast I go, I could be going 5 mph to 80 it's just kind of random I was think maybe the acceleration or something to but doesn't matter how fast or slow I could be doing consistent speed and it will do it whatever speed.

 

Check my signature below. What engine size?

So your engine stalled while driving at random speed, and you restarted without a problem. How about waiting at traffic light?
How do you know your truck was in limp mode?

 

What kind of scan tool do you have and can it give you info like engine temp, battery voltage, oxygen sensor readings voltage , cross counts and does it provide fuel trim info ?
Has the truck started moving yet or does it go into limp mode before moving or only after moving ?
When it goes into limp mode , check engine light , if so what codes ?
Does it seem to reset once you turn the key off? If so, can you check for codes before turning it off ?

 

So its a V10 titan, the speed drops down to 40 at the most you can drop the petal to the ground and it won't gonany faster than that, and it starts right up just fine like it's normal
I can be stopped at a light and it's fine it's while your driving it does it .

 

No codes are being thrown and no check engine light yes my scan tool can do all that

 

When we talk about scan tool, the $5 generic obd scanner from harbor freight can't do it. You need a "ford specific" scan tool to get the trouble codes. Your van can have 20 existing trouble codes without triggering the check engine light. Remember, "ford specific".

1) Locate C150, the ECT sensor above, remove just the electrical connector, use contact cleaner (wire brush if needed) and clean both ends. If it's highly corroded and can't be cleaned just buy the new connector from like rockauto.
Please note this ECT is for computer (PCM) the one for gauge is different. The ECT itself never breaks and usually it's a bad electrical connector, and sending wrong signal to the PCM. Also note that PCM relies on ECT signal heavily.

2) Locate C1041, the MAF. Same as ECT, you remove just the electrical connector and clean, your PCM also relies on this heavily. The difference, the sensing element on MAF can go bad easily and it requires routine cleaning like once a year, using MAF cleaner. MAF cleaner can't rescue and save the MAF, it's to be used for routine cleaning, if yous is bad.

3) Start up your van for a drive, if the same thing (engine stalling) happens just pull over to a safe spot. Pop the hood and remove just the electrical connector of your MAF, then disconnect your battery's ground cable and wait 10 minutes. Connect just your ground cable back, leave the MAF's electrical connector unplugged. Close the hood and drive, you will get CEL immediately when driving without MAF, you will also get rough idling, your van could be in LIMP mode, but your engine shouldn't stall anymore, just continue to drive a bit longer. If that's the case, more than likely you have a bad MAF. Of course if driving without MAF doesn't show any improvement as far as engine stalling is concern, then your MAF, doesn't necessary mean it's fine, is not the cause of the problem. Once you finish your driving, just plug the MAF back in, the CEL should go away.

You don't need any special tool or tons of time to test these.

 

Can you give us the readings on your scan tool at idle and 2500 RPM ?

Battery voltage, fuel trim numbers, MAF ,RPM, TPS, ECT, Oxygen sensor volts bank one and two. and H2O2 oxygen sensor rdgs, thank you.