HI Guys, I'm new to this forum and a new owner of a 2007 G 35X (automatic). I've been reading some of your posts and they have been useful...although, my problem still exists!

So, i bought this car last week, got it inspected by Infiniti - no problems, clean history.
I drove it this week and noticed that coming to a stop, the RPM bounces from 1000 to 1500!
So my brother (mechanic) and i decided to change the air filters, clean the TB and MAF sensors...(Battery disconnected)
The problem got even worse, that's when I read about all the 're-teaching' on this forum.
I did ALL of them, multiple times...everything seemed to go well but I still have the rough idle at 1000 RPM!
I also read that after a couple days, the car should teach itself??? Should I wait or am I missing something?? (BTW, the "service engine soon" light came on, Code P0507)
Any help? Thanks!

 

A P0507 DTC trouble code may be caused by one or more of the following:

A vacuum leak
Leaking air intake after the throttle body
EGR valve leaking vacuum
A faulty positive crankcase ventilation (PCV) valve
Damaged/failed/dirty throttle body
Failed EVAP system
Failed IAC (idle air controller) or faulty IAC circuit

 

Thanks for the quick response!
I checked for air leaks and everthing seems fine.
I tried all of the re-teach pedal dance again...nothing.
Cleaned the throttle bodies again and noticed that they are not 100% closed (not completely 90 degrees to the port if you know what I mean?)
I will inspect the PVC valve and clean IAC next.
(can anyone lead me to a link on how to locate and remove these??? )

Thanks, the car is getting hard to drive with all of the bouncing RPM and stuttering!

 

PCV and IAC - OK
Now I'm thinking changing throttle bodies or re-programming???
Anyone?

Thanks.