Thanks for the tip MGDfan
I dont think it's the filter because it was running fine before the plug change, but I should do the list on the link you gave me.
I was thinking more along with the boots I didnt change those.

 

I removed and cleaned the TB Carquest fuel injection and air-intake cleaner, The boots are the next job that I'm going to change. It was very black and oily.
Yesterday when I replaced the Autolight plugs with originals I checked the resistance of all the coil packs they were all good between 5500-5730.

How tight should the boot be on the spark plug? should the boot and how tight should the spring be also?

 

This may help.

https://www.f150online.com/forums/v8...ease-boot.html

MGD

 

I replaced the COP on all the coils, greased them also cleaned the terminals on the coils also. The problem is still there when I slow down to a stop not all the time the idel goes down it starts bucking I flip her in to neutral than it's okay.
Than I was driving on a road at all speeds, it's only when the vehicle is at about 5mph the idle is low than it wants too stall.

I bought a fuel filter today going to change it tomorrow, but I bet it's the MAF sensor.
No CEL, no codes...
I'll keep you guys up to date.

Any suggestion.

 

Possibly - Here's a thread where a bad MAF was finally found to be the culprit - cleaning it did not help: https://www.f150online.com/forums/20...tion-stop.html

It could also be the TB.

MGD

 

Good morning!
This morning I changed the fuel filter, it was due. I'll cut it open later on today. Removed the MAF and cleaned it again with this time CRC MAF cleaner.

Everything is good accept for the low idle which causes it to stall, not all the time. Is there a way to check MAF & TB.

I use to be a tech for Grove Cranes, they also had trouble with low idle on the TMS 745 cranes. We were able to adjust the throttle with a multimeter in milivolts. I'M wondering if it was done on Fords with electronic gas pedals?

 

Update on my stalling issue
I changed the MAF this morning and It's still stalling????
I pluged my obd2 in and got misfire codes on po304,po305, and po307????

Than I was reading about wire harness touching the AC canister that it does weird things to these vehicules. So I placed a flat piece of wood between the harness and canister and also on the valve cover and the harness. the wood is temporarly there just to see if the theory works.
Now the OBD2 gave me error codes po345, and po305?
Can it be a short in the main wire harness?

The truck is equiped with a remote starter, and anti theft, sometimes when the truck goes to stall you could hear the horn beep of the anti theft device? Should I remove the remote strater and anti theft device, could this be causing a short circut.

 

Here is an update about the low idle!
I tested my MAF sensor and the signal was eratic, so I changed it. Still have the same problem. I did some reaserch on misfire issues and found a link about main wire harness shorting out against the ac canister.
I plugged in my obd2 and got fault and got misfire codes po304, po305, and po307. So I checked the harness at the AC canister which was against it and put temporarly a piece of wood between the canister and the harness. I rechecked with the OBD2 now I have cam position sensor, and po305.
Can it be electrical due to moisture from the AC canister?