I had a check engine light for all four of O2 sensors. I replaced them and then this problem began to occur. it idles very poorly. It will sound like it has a cam and then clear back up and do it all over again and when driving it will pop and gurgle no matter how far you push the pedal down to the floor but after 60 miles an hour, it will clear up like nothing ever happened. when this problem occurred, the check engine light came on again, saying that the bank one sensor one O2 sensor was reading, very rich. I’m at a loss of what it could be whether it’s a fuel pump, new spark, plugs or coil packs I don’t know anymore.

 

Forgot to mention the main part lol. its a 2011 5.4L and its pretty old its has 211k