I have a 2002 Acura RSX base model that is currently making a very weird rattling noise. It's very hard to locate the source because I can only hear this from the inside, and not the outside. It happens during idle in Park and in drive. I notice that when I drive and make a right turn(like shifting lane, etc..), the noise goes away instantly. I looked under the car while the engine in Park and couldn't locate the noise because it's not audible from the outside, only when I'm in the car. I had a friend push the engine to the left(toward drive side) when the car is in Park, and the noise disappears, but that doesn't help when the car in D. It seems to be something relates to engine position. Ohhh, the noise is not there when the car is in reverse.

Anyone has any suggestion? Thanks.

 

Sounds like something is rattling from vibrations that idling causes. Does it sound mechanical in any way? Or could it be the glovebox or another interior part? Does it go away if give it enough gas to rev 100 rpm's higher than idle? Any mods?

 

It sounds like a vibrating exhaust hitting the underbody...but I checked it all...no touching anywhere. No mods.

Will check the rpm tomorrow.

 

Check your heat shield, Ive heard of them getting loose and making tons of noise.

 

Ceck your 02 sensors, If their loose theyll rattle like a mf

 

are you sure its not the intake manifold cover?