Yes, i just got my 300Z TT out of the shop. I replaced the PCV's, plugs and filter. The car was running fine, then yesterday it started to get a roguh idle. Like it was missing but it still runs good when i floor it. It will idle good for about 50 seconds then pop a few times for about 20 seconds then back to good. Anyone know what this could be, do you think it is something serious? Thanks for the help.