I am having idling issues. '08 3SS AWD, no codes but on scan shows the o2 sensors as 'slow switching'. 78 is min and b1s1 is 73/73, b2s1 is 36/40 on test $80 and $81. (using just an Innova 3130 scanner so it is captured data from the cpm, not a 'live reading'. Sometimes the engine runs really well, sometimes it feels as though it has a miss. No codes at all. Just idles smooth then rough, then smooth. Also noted that after a tight right hand turn, the engine runs better. No, it's not low on fuel. Very strange as it is injected. This is the first injected performance vehicle I have owned. Any suggestions will be appreciated. Also had a question about the ground on the front of the left head, where does it connect to on the body? I just bought the vehicle and it doesn't have a ground there, but it does read "Ground" at the front of the head, bolt is there but cable is gone.