I have a 2006 G35 6MT with about 45,000 miles on it. I live in Florida and the past few days when I start my car it will rev around 1,800 rpm's for about a min or two. The car never use to do this. I could understand if it was cold out but the weather has been in the 70's.

Is there anything that I can check or should I just bring it into the dealer?

I have already checked the oil and that is fine. I also checked to see if the air filter was dirty and it wasn't.

Any help would be great. Thanks in advance.

 

check the throttle maybe. fuel pressure, ignition timing, alternator

 

Thanks,

I did check the throttle and it seemed fine. It fixes the problem on its own after a few min but just seems strange that all of a sudden it started to happen.

 

This is normal. On cold starts the engine rev to 1.5k plus to help warm the car faster.