I was driving my car after I fixed most of the drivibility problems. I was about 30 minutes into driving. Parking lot, first gear and I hear crackling coming out of the speakers. No buzzing, just random rice crispies. Then I looked at my a/f gauge and it was stuck on full rich for about 30 seconds. I sped up and same symptoms. Just replaced o2 sensors a few days ago. Then it just went away the rest of the night. I am sill having low rpm slight missing/bucking at 40 in 5th at little throttle. I am going to pull codes but don't have any hope. What could cause stereo interference? Do you think my coil has been going bad? My car only does this when warm.