Hey been having problems w sometimes having power and sometimes not. I'm running on sportlines (going back to stock soon) and my exhaust hits the pavement sometimes. Well a few days ago when it hit, my car started to bog and lost power but didn't die. It caught itself and was back to normal in a few minutes I have noticed a exhaust leak that almost sounds like arcing right were the o2 sits. Haven't jacked it up yet, but what do you think?

 

I have heard of this happening to several people. If it does not happen unless you bottom out, I would not worry about it for now.

 

Jack it up and look at it. A leak at the O2 sensors is going to mess up the PCM's A/F ratio control.