So i am new to all this and i am not super car savvy. I have a 2009 g37 coupe. I've noticed when i start up the car after not using it for some hours it starts up fine but then i push to start, turn it off right after then turn it on, it sounds like it struggles to start up. Have any of you experience this before? I have already checked the battery and it's not it

 

Probably throttle bodies need to be cleaned, they get a lot of carbon buildup inside of them, I'm about to do it myself on my 2008. Take it to dealer or do it yourself with some carb cleaner.

https://www.myg37.com/forums/d-i-y-i...le-bodies.html

 

awesome, thanks so much. Does this problem happen to you as well?

 

Or it could be the battery, Happened to me 2 months ago, after I replace the battery and it's fine now.

 

yeah, I had the battery checked out and it wasn't it, I have a feeling it is the throttle bodies.

 

Yeah happens on my 08 coupe and on wife's 09 sedan. Was gonna clean both of them in the spring. Never had this issue on G35 though but I cleaned throttle body anyway, it will run a little bit better after cleaning, just have to be careful with batterfly valve so it doesn't need to do idle relearn which is a pain to do without Nissan Consult tool