[Eldorado]

well when i bought the car it rattled.
I took it to Midas, borrowed their lift... lifted it up and banged around and found the culprit to be a loose o2 sensor... tightened it down and it sounded great...

drove it for about 2 or 3 weeks sounding good... and as you may or may not remember from a previous post of mine, I had a small emergency that required me to drive the car hard to get a friend of mine somewhere.... after i got back home that night, the rattling came back... or should I say *a* rattling was heard..

i assumed it was the o2 sensor and didn't think anything of it until yesterday when i took it back to Midas to steal their lift... hoisted it up and went to tighten the sensor... it was still firmly in place...

i banged around the entire exhaust system under the car hoping to find a loose clamp or something - nothing.. it was all fairly solid..

so my question to you is this..... if it's not the o2 sensor, and it's not any (noticable) clamp or part of the exhaust... then what could it be?

if it helps, it doesn't do it when the car is first started... it idles quietly... then you drive it for a minute or two, it starts... and THEN it does it at idle...

it gets worse the harder you drive it...

ANY ideas? it sounds like it's coming from under the car..