i looked around and used the search

and came thru this

https://g35driver.com/forums/intake-...st-note-2.html

but didnt really found my answer


i have a 2004 auto sedan

and when i turned it on today

i noticed it was only blowing and making noise from one muffler and nothing from the other

http://i196.photobucket.com/albums/a...i2/ghghggh.jpg

the green line means its blowing out a lil bit of smoke and making noise
the red means nothing

is there something wrong or is this normal or what

please let me know

 

That's normal; there's a flapper in the muffler that restricts the flow to one side until the car is warmed up. After a while you'll notice exhaust coming out of both outlets.

Those red and green lines, however, are NOT normal, LOL!!

 

whats after awhile ?

i left it running for like 5mins or so ?


no my muffler has its own stop and go lights lol

custom feature no one else has it lol

( it was just to show lol )

 

Probably depends on ambient temperature. I hear it's cold in FL right now. Don't worry about it.

 

yea it was a little cold like 50 F last night but today in the morning allot of sun

probaly like 74 F

so its fine nothing to worry about

 

I am pretty certain the flap opens according to a certain rpm. Not that its an ecu fucntion but the velocity is high enough over say 3k rpms where the flap opens up. I had the same system on my old 2k1 maxima oem muffler.

 

Bingo. Same design was used on the prior GTR cars, the 5th gen Maxima, the last Sentra SER/SPECV, plus a handful of BMWs, Mercedes, and Volvos.

The coupe does not have this flapper. The coupe muffler is a cross-flow style and is arguably more restrictive overall.

 

soo everything is fine if there not blowing at the same time

 

My sedan puffs out of both outlets all the time.....hot, cold, idle...always both

 

yea ? what year ?

 

mines 04 sedan auto ;. idk if it might be different

since yours is 06 and X

 

That sounds right.

 

It's the flapper doesn't have an air tight fit. If you see equal amounts of fumes coming from the exhaust at idle, then it could be that the flapper is seized open.

 

But you guys mostly have 03/04 though. Maybe the 05/06 is a different design?

Unless it was seized open at 19k miles when I bought the car

 

seized open ?? as in it always stays open ?

so is it better to have both of them blowing

or the way my car is ??

still a bit confused