I seem to remember reading a post about the following.
I installed my CAI
As I was just listening to my car idling, I have the feeling it makes some light 'rattling' sound coming from the engine, but can't exactly remember if it was like that before.
Can this be caused by installing the CAI
or is the celi just a bit on the noisy side runing idle?
I do not get the CEL on, so everything is connected just fine.