For a few months I have been noticing when I put the car in park, most of the time but, not always the idle will drop real low and then come back up and it will teeter tot back and forth about 3 times before coming to sit where its supposed to be. Tonight though I pulled home and put the car in park but left it running and after a few minutes of it idling totally fine out of no where it starts stuttering and then it will recover and it'll go back and forth until it finally stalls unles I give a little push on the gas. I should mention that after it stalled the traction control light was on and not turn off able. I was also watching my wideband the whole time and it was really weird because when it would start stuttering the afr was dropping into the low-mid 12's. Any ideas what this could be?

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