Well my Z has been well taken care of and I'm not sure if this is common or not.

My Z idles fine, no codes or anything. There just seems to be a pop kind of like popcorn and you can hear it just based on how the engine idles.

It's done this since I got the car with 30K and now I'm at 45K. But never had a code (even pending). I cleaned my MAF and K&N drop in intake and still the noise is there.

Is this something I should worry about?

 

I have the same thing happening on my Z. Been a year since it started doing it. Since then, no problems yet

 

One of your coil pad broke use a OBDII scanner to see which bank of coil is out of order!!!

 

There are no codes. I have checked (today) with the car idling and just with the key in the ignition to see if any are pending and they are not- never have.

So I'm a bit stumped to be honest. But I don't noticed any difference in driving, fuel economy or performance.

 

I have the same problem. Not worrying about it since my car is fine

 

Ok good lol, I was worried for a bit.

 

I found the issue:

http://consumerguideauto.howstuffwor...san-350z-2.htm