Turbodent

So update to this, swapped out the throttle body and it got a lot better until tonight, only code I could read is. P0300. Going to get my good scanner on it in the morning. Any ideas? I saw a video where the o2 were causing the code.

I’ve watched the rpm signal on my scan tool and it shows constant rpm and a decline to zero when it stalls. Doesn’t go to zero and back, before the stall.

Need some help with the wife’s truck. To start off, it’s a 2012 gmc sierra 5.3 with 460,****** KM. Been a drop dead reliable truck. That’s been in her family since new. recently it would fire up idle for a minute or so then die, only at idle if you’re driving or revinf the engine up it doesn’t do it. Got some misfire codes on the drive home the first time it happened. Her dad wasn’t sure if it ever got plugs so I threw a set of plugs at it and it ran way better. Gave the truck back to the wife and it died at a stop light on her drive home from work. Now zero codes. I looked at it went through the entire truck no smoking gun. So is started driving it daily for a few days with my scan tool on it. Had it happen to me a few times fuel pressure stays around 52 psi even when it would die. For a u0101 code the other day. TCM wiring looks good. All the grounds are in good shape. no vacuum leaks or anything like that. couple mechanic buddy’s of mine are stumped too. what should I check?