Another interesting day in the Life of 3F-Eing. Go to move the truck so I can blow out the driveway (-15 deg F) start it up, idles low and rough so I give it a little gas and it starts to idle up fine, let it run for a good 15min or so as I get the blowers running and such. Truck is pretty warm by now so I give it a little gas and get ready to move it, after the RPM drops to hot idle speed, it starts to loft almost stalling and continues to idle that way, exhaust is smoking thin black and you can smell its super rich, if you bring the rpm up it smooths out and runs fine, it also smooths out while driving around, only at idle run like total crap.
Had this same issue before but never did figure it out. Mind you, I drove it all over last night in slightly warmer temps and it was normal. Also after shutting it off, and restarting it a few minutes later, it idled normal (Like something needed to warm up)
The two main accordion intake boots are new and all other vac related hoses are newer and aren't cracked. This has to be some electrical component, but WHAT!? Can this be a TPS issue? If this was an AFM issue, I've read the truck will die when increasing rpms because of unmetered air.