I own and Infiniti g35 coupe 2007. Im recently having a rough idle issue. The car drives good and has no power loss or any sort of indication that something is wrong. Just at times when I come to a complete stop I have a rough idle with a smell of fuel . It doesn't happen all the time maybe once per day . There is also no check engine light.

Leaking fuel injector?

Could that be leaking without a check engine light being thrown ?

Have you hooked a reader up to it anyway to see if you have any pending codes or maybe the bulb to the CEL is blown?

Yes there is no codes . And the check engine light does work .

Have the same issues rpms wil drop from 6500 to 6000rpms the goes back normal it feels like a hiccup no loss power goes up on hills good did end it up knowing what the issues was?