thanks for all the info you guys provide!...maybe of of you might have the answer, it is not the Catalytic Coverter or the heat shield, Nissan look at it and it is definitely not the gas I put. I was suggested by the stealership to do a fuel cleaning but the car has only 43k...the rattle comes from a stop or under load between 1-2000rpm and yes it does sound like beans in a can for a few seconds. Lucky for me it is not often...I dont feel any power lose or vibrations but it annoys the hell out of me. Please can someone

 

well here we go i have the same probelm and its the carbon build up on your motor atleast thats what is for mine. Sometimes it does it sometimes it dont. i car wa at the dealership for 2 weeks everything was check no leak or anything so i just living with it. I did put seafoam in it helped little but still dere

 

Its more like clunk clunk noise like metal on metal right?

 

Is the famous beans in a can sound! damn!! its freakin annoying!

 

It's carbon I had the same issue with my M35 I had the infiniti dealer clean the fuel system and throttle body It did quite the noise alot and it idles much smoother but the rattle can still be heard


On the NICO forum users have reported the same noise and it was the CATS making the same rattle noise can some one get a sound click I'll post it on NICO forum and have the infiniti tech listen then report back it worth a shot

 

thanks man! appreciated!

 

i think i have the same rattling/beans in a can noise on my 04 max. its been there at least 6 months but the past two weeks has gotten noticeably louder and more frequent? still think its just a build up on the motor? would a detailed engine cleaning help?

 

Guys, does the sound go away once the engine is hot? Mine does.
It also goes away after 3000 rpm.

It started about 60K miles ago, and it has gradually become louder. Sometimes if I turn the engine off and then back on (when the engine has reached normal-warm temp) the noise goes away.

If it's carbon, how can we get rid of it? Where is it being held up? in the cylinder chamber? between valves???

 

the sound is for a few seconds and it goes away, (thank God!) it may come back from a stop, rarely on a left/right turn since you have to slow down or under load. its between 1-2000rpm...around 3k I'm gone!!...fricking marbles shaking in a can!!

 

Thanks for the post. The info gathered was helpful

 

What octane fuel are you using?

 

93 octane...I also heard the freaking marbles sound from other car makers, Camry, Lexus...damn!