my 06 acura rsx type-s makes a wierd rattlin noise at 3-4k rpm even when parked and in neautral?

Answer 1

This can be almost anything. It can be a loose heat shield in either the engine bay or exhaust. It can be an infected fuel filter. A faulty cam adjuster. Your coin box might be loose. You may have a broken glass pack in the exhaust. Are any of the clips holding your hoodliner loose or broken? You may have a tear or hole in your air filter. Check to see if the fan is hitting anything. You might have a broken finger in your clutch.

If you can't isolate where the sound is coming from and fix it, you should take it to a mechanic. They will either be able to scan the car for trouble codes and figure it out that way, or they'll know from experience what it is. Either way, if you don't know what it is, it can either be simple or it can be serious. And even simple problems can cause serious ones later on. Rather than risk it, use that warranty and take the car in to the dealer and have it checked out.

Good luck!

Answer 2

is the sound coming from the exhaust? or the engine..??

if the engine then probaly u'v got a worn-out engine or transmission mounting.. try to have somebody to start/crank the engine.. is the engine vibrates during that crank/start moment..?