I have done many searches and cant seem to find an answer. I get a rattle under my car when at idle or in gear, clutch in or out. I have checked underneath to see if i can find anything that rattles. That came up empty. Anyone think its possible that the cat could be making noise? It has a buschur exhaust. Any help would be appreciated.

 

i have this too does it seem like its coming from the front passenger side? if so i was told its most likely your downpipe hitting but who knows

 

if you have a spark plug fouler for a cel fix check that it could be rubbing against the car....it happened to me and this could very well be your problem

 

mine does sound like its coming from the passenger side. It just started doing it. Id love to find out what it is if anybody has any ideas.

 

I had the same issue when i first got my evo.

On your driveshaft going into your transfercase there is a metal sleeve. It may have come loose.

I took a big flathead at the time and pryed/ripped it off. Just make sure this is the issue before you take my advice and start ripping pieces from your car.

I at the time and now dont need the sleeve on there.

 

Thanks for the idea. I will check that out tomorrow. its just so hard to tell where its coming from underneath the car.

 

I just found a rattle similar to what you are describing. it was my intercooler hitting my crash bar. I checked everything and never thought this was the problem til I slammed my door shut and heard it one day. Bingo. Rattle gone

 

Yea, I got a rattle somewhere too. Most likely something hitting and not a major problem. happens every now and then.

 

the biggest thing is that it is coming from underneath the car but i cant seem to figure out what it is.

 

its definitely possible its your downpipe or your CEL fix if you have one because i have a rattle in my car only at low rpms going into first gear im also thinking its me CEL fix on my test pipe..jack it up and check things out underneath

 

Turned out to be the cat. Shake it and it sounds like theres rocks inside of it.