Some days when I start my car the rpm drops extremely low. Almost to the point of sounding like its going to stall. My warranty ends in march. Is this something many encounter or something I should go to Infiniti for?

 

How low is low, mine on a cold start up on a chilly morning is around 600-800 rpm until it warms up a bit?

 

It drops down to what seems around 300-and up for a brief moment then returns to the average 1200ish area. Ill make sure to check it tomorrow morning, when i head to work to get an exact number.

 

400 is the magic number

 

Cold morning starts s/b slightly over 1K rpms, withing 5 minutes it should drop to between 5 and 600 which is normal warm idle. Since you still have a warranty have the stealership fix it for you or you could SEARCH "Idle reset."
Gary

 

Clean your throttle body, it should help assuming there's not something else wrong. If the throttle body is dirty enough to completly seal your idle air control valve may not be able to flow quite enough for cold idle.

Edit: just read the post more thoroughly, take it to the dealership before the warranty expires. How many miles are on it? Make sure they tell you what they do to repair it if anything and report back, I am curious.

 

Hey guys as I saw this thread and I have a similar issue I will just post it here. I have an '04 G35x with about 108000 miles. And on cold days meaning below 30F and the car has been sitting overnight, when started the RPM dips below 500 for a quick moment and seems like it will stall but goes right back up to 1200/1100 and comes down slowly after the engine is warm.
Obviously as long as the engine is warm it won't do it again until it has been sitting for several hours.
From what I can see with all the suggestions it seems like it could be a vacuum leak or the TB?

MODS: Motordyne 5/16" plenum spacer ISO Copper, Stillen Intake Kit (Cleaned the filter few months ago), Megan Racing Exhaust.

 

Dang mine goes up to like 1600 for about 30 seconds and then tapers off to 1200 on cold starts

 

All right got the throttle body cleaned and reset it. This morning it was all good. Hopefully that was it and nothing more. Will update if it does it again.

 

To reset it, did you just disconnect the battery for a while? Is cleaning the throttlebody a simple procedure? I am having the exact same issue.

 

For resetting look at the last page of this pdf:
http://www.motordyneengineering.com/manual.pdf

And for throttle body you can just disconnect it from the intake pipe and stuff and then take a rag and use some carb cleaner and wipe it. Or you can unbolt the whole thing and take it out and do it. I just took out my intake pipe and disconnected the cables and did it like that and then did a complete reset including ECU, paddle, air volume etc....

If you just want to try the reset then do it a few times as it is really hard to make sure you got it right if your rpm is already normal. When you clean it will be revving higher and once you got it right you will know because it will go down back to normal.

 

Really great video here as well:

http://infinitihelp.com/diy/gsedan/p..._procedure.htm