So I am stalling at idle and it falls flat at certain points of accelerating, particularly when just slightly accelerating - just falls flat, gargles and sometimes stalls.
It stalls continually in heavy traffic. Runtime seems to have something to do with this as the first 15-20 minutes of the day, no issues.
Putting your foot into it sometimes helps. When heavily accelerating, you can hear it surging or something - running normal for 2 seconds, then falling back 2 seconds, then normal, then back... It is not perceptible in the motion of the car, but you can hear the engine doing this.
At slow speeds, this same activity stalls it.
I previously had a plugged cat converter that I just swapped. I have replaced the spark plugs about 8k mile ago.
The only engine codes I have seen was one for misfire in number 6 (ordered coil/wire set just as precaution.)
It seems computer related due to its predictable weirdness of 2 second good/bad behavior. Or? Throttle body? Fuel rails? Injector? Just not relearned since plugged converter?