Whats up. Haven't been on in a while. There is some stupid rattling sound underneath my car and I can't figure out what it is! I just put intake on my car and I cant figure if thats causing it or if it's something else. It sounds like its coming from right underneath me so I'm starting to expect my tranny mounts or my exhaust is loose. The tranny has been taking awhile to shift so I don't know. Any help is good.

 

i have the exact same problem. but i have no clue wat is causing this problem sorry -= (

 

Do u have ever remove the engine or trans before! My GF had a civic with the same problem with new used engine especial when the engine reach normal temperture. First, I was think about the motor mounts or trans mounts, but they works ok! Everything seems and works ok! But I did found some extra bolts under the hood! I don't know where does it come from! maybe becasue something loses! Anyway,if u figure out what is the problem, let us know! Good Luck!

 

Could be your cat, the cat sheild, exhaust piping, trans, mounts, a cat underneath your car. Find whats loose and tighten it, or fix it

 

I do believe it is the cat. It's not loose so I must need a new one. Thanx anyways.