Hi Folks,
I did a lot of searching but couldn't find a thread with a similar issue. 2005 G35 Coupe 6mt

I start the car up - get it to normal operating temperature and it will idle fine for about 30 seconds then the RPM's will dip down to almost stall then recover to normal....idles for another 30 seconds or so and repeat the same issue. has anyone experience this?

I've tested all the vacuum hoses and replace the PCV - but still the same issue. The car drives great except for this issue. I'll get a misfire code if the RPM's drop low enough... Any help or ideas would be GREATLY appreciated.

I've done ECU reset and all the documented "resets" Throttle, idle , airflow etc...

Thanks