rattling question?

[Booost Freak310]

u know wat iv'e been hearing some 1sec rattling noise when i start my car sometime's in the morning when it's cold not sure wat it is but only sometime when my car is cold i start it and like a weird rattling noise for 1sec i think under the hood weird!

 

[StuLax18]

ive noticed that when you first start the car it sounds different at first. i think it revs up a little higher before dropping down to idle, so the frequency could be making something rattle just for that time period. might want to pop the hood and have someone start it while you listen.

 

[robb<35>]

i've heard this unusal sound as well

 

[Booost Freak310]

So im not the only one tripin out lol.
Im going to check it out 2morrow.

 

[gto]

No rattle here

 

[Booost Freak310]

AGAIN IN THE MORNING IT DID AND ALSO AFTER WORK IT ONLY HAPPEN'S WHEN I LET MY CAR SIT FOR A FEW HOUR'S.
HMM WEIRD I STILL COULDN'T FIND OUT WAT IT IS.:thumpdown:

 

[Pupp]

Is it a rattle or more of a loud clicking?

 

[Mikefx3508]

I haven't, here's a tip for cold startups. Warm it up until the RPM is down to 1000 RPM, then drive.

 

[Booost Freak310]

rattling.
just only at cold startups im going to take it in since i have warranty.

 

[ib1217]

Is it a rattle or more of a loud clicking?

I've heard the click, too. Only on cold startups, and only clicks once. Not sure what it is....took it to the dealer (under warranty) who said that all was well, mechanically...

 

[Booost Freak310]

i think i found the promblem iv'e been using midgrade 89octane.
beacause ever since now i used 91 octane it does not rattle anymore during startup

 

[metrocheryl]

all of you i believe you ae hearing the ABS CHECKING the computer system its suppose to do this periodically at cold start . if you have any other questions you can call me at metro infiniti 626 599-7528

 

[Booost Freak310]

im pretty sure that's not the abs checking it self when i heard it cuz it was a rattlling noise that im sure doesn't sound like any abs checking it self.
or maybe i can be wrong lol.:zip: