My engine is stalling at idle can you help me please?

Check engine light has been on for for a few months now, it’s my oxygen sensors bank 1 sensor 1 and bank 2 sensor 1, heat malfunction. It’s never ran any differently with the light being on. I installed an AFE stage 2 cold air intake on it about 2 months ago. I personally don’t have any scanners but I can probably get one tomorrow and try it out. Don’t smell any fuel, little bit of black residue on my tailpipe lately. I replaced the upper intake manifold gasket and throttle body gasket today as well.

Okay. So I just bought this truck with a 5.4l triton. It ran amazing when I bought it but I haven't made a payment yet and already have had some issues with it. Randomly when I put it into drive (only drive does this) it will bog down and want to stall out (let me add it has stalled out doing this multiple times now) it starts up beautifully. It idles smooth but for some reason it wants to bog down sometimes. When I say sometimes I mean I can put it into park then into drive and it be fine three times in a row but then on the fourth it'll want to stall out. Some times if I were to put it into second my rpm's fluctuate lightly. It sometimes wants to bog down when I turn the steering wheel and am going slow and sometimes does a ruff bog when I come to a stop. I replaced both VCT solenoids. I tried a new throttle body in case it was my TPS. I added fuel cleaner to the tank of gas I have now.I cleaned my mas. I hear a clicking noise from what I think to be my fuel injectors maybe. I noticed I really only have this issue when I have a cold engine like it sat all night or sat all day while I'm at work. From time to time my first three gears that shift when I drive have a bit of a juke to them like a struggle. No check engine lights no stored codes. I have a obd2 checker (jethax) any ideas? I would like to add other than this the truck runs like a Cadillac. Which is what's so frustrating. Once she's warm or I cycle from drive to park a couple times and maybe not gun it but speed through that random ruff shift from a dead stop it's like a cloud.

Is the PCM a dealer only part? Was there a recall for it or was it just an adjustment made through programming?

While driving I pushed clutch in to downshift and stop. Started right up but did it again every time I stopped accelerating. No check engine light or other lights on dash. Asked a few mechanics they said it could be an idle air control sensor. My vehicle does not have on on throttle body, only throttle position sensor. Any help would be great.

I checked all vacuum lines using this method. Does not appear to be any leaks. No I don't have a live data scanner. Any other ideas.

The throttle body has only one connection to the throttle position sensor. I have replaced that and totally cleaned throttle body. Everything is working fine now. Also, idle is more stable than it was before this issue. Not sure if this was the right fix but it worked, for now. Thank you for your input. I truly appreciated it.

Truck shuts off when put in reverse or drive. Will idle fine in park.

My engine (5.4l Triton) doesn’t want to run when in drive or reverse when it is warmed up. I just changed the oil in it and an hour after that when I was driving, it kept trying to shut off. When I put it back in park and rev it, it goes back to a perfect idle. But when I put it back in drive it goes to this terrible rough idle then shuts off.

I used 5w-20 motor oil which is what it calls for. And I put in 7 quarts which is also what it calls for. Is that correct?