What is the rattle?!
I have a 1993 Bonneville SSEi and I have a nasty sounding rattle at idle. Once I get the RPM over 1300 it dissapates. The motor is also acting funny, it idles fine then stumbles then fine. I have just replaced the supercharger (rebuild from Canadian Superchargers) and the water pump. I ran the car with the serpentine belts off and no noise. I tried isolating by using one belt at a time and it still had the problem. I am thinking it is the harmonic balancer. I just want to be sure though. Has anyone else ran into this problem? Could that be the cause of my motor troubles?