I installed a brand new cold air intake AEM.... I have a 2004 g35 coupe with only 48k miles all stock w/ auto trans.

I put this in about a month ago and now i hear a rattle noise during low idle speads about 1500-2500 rpm....

And i know this is wierd but when im coming to a red light stop or bumper to bumper traffic i shift into Neutral but while driving even like 20mph and take foot off gas and shift to N the engine stalls out!

I have a bumper to bumper warranty but im sure this intake will void warranty... Has any one heard of this intake doing anything like this?

and should i switch back to the stock intake for good and if i bring it in for service???

 

So, why are you trying to shift an automatic transmission again?

 

sounds like a vacuum leak

Double check you didn't knock anything loose or forget to reconnect something

 

The rattle is most likely being caused by a portion of the intake hitting a part of the chassis. Don't forget that the engine torques around in it's mounts quite a bit which then tugs at the intake tract. Simply grasp the intake and move it around. Chances are you'll see where the intake is hitting the chassis. Problem solved.

 

What are those two wires and that odd box near the maf???

 

dont shift it into neutral. its not a 6mt

 

I have to agree with thatguy II. I just came out of an '07 Eclipse with a K&N CAI. The engine movement ripped a hole in the side of the intake and it began to stall out when I came to a stop.

Call me lazy, but I just put some Gorilla Tape on the hole and traded it for an '06 G35 Coupe. Had it for two weeks. BTW, love this forum.

 

Sounds like the case. But I'm thinking either the intake is improperly installed or the motor mounts need to be replaced. The intake shouldn't be close enough to touching anything to make any rattling sounds... otherwise, there would be plenty more threads about it here...

Either way, it isn't a vacuum leak. If it was, your motor will be revving by itself, sometimes until it dies out on you.

And quit shifting your automatic transmission... it takes care of itself for you already.

 

Alright thanks guys.... Took out the intake today but still hear the same rattle its at like idle and -2500 rpms.... sitting still and driving.

Installed the stock intake and same problem with the car stalling out. I understand its an auto but what automatic do you hear of stalling the engine out when you shift to neutral? Non that i did....

but if your sitting at a red light and just flip it from D to N it goes to like 200 rpms then 900 than just goes down and stalls...

IDK what the hell that prob is...

im just gunna bring it to the dealer....

 

It should be idling around 750 when you stop at a light - start there.

 

unrelated, but



watch that clearance circled in red... its looks pretty tight... you don't want to wear a hole in that aluminum line, because its a $700 fix... get some wire loom or something and wrap the line.

 

What automatic do you need to shift at all while you're driving?

 

post a vid so we can hear the sound

 

Hey thanks for the Clearance Spec.... I seen that during the install and i put a rubber vibration cushion the MAF where it hits touches that hose..... But good loooking out thanks...

And guys to clear things up... I dont shift into N while driving say 60mph...

When i come to a traffic stop i did it maybe like 5 times!!! ITs not a common thing but its just the point that the car shouldnt stall out if shift into N even if i was doing 80 and popped it into N you know what i mean...

 

you could stall in an auto?