Right around 3000-3500rpm there is an annoying rattling coming from the engine bay/back of the car. It is only under load, typically in a higher gear (aka, 4th gear at 3000rpm). As soon as you cross 3500rpm, the sound is gone! You can not hear anything when rev'ing the engine when the car is still, it has to have a bit of load on it.
Seems to be the harmonics/vibrations at those rpm are making something rattle. Sounds like a loose bolt or something?
I've tried the easy stuff like the rear license plate, the exhaust shield, trunk support, ext.
Any idea's???
Thanks!
-mark