So I've had this '11 g37xs coupe for 3 months and when I first bought it, I could've sworn when I gave it a solid push on the gas pedal, this thing would fly and almost jerk me backwards... 3 months in, I feel it takes a bit longer to get up to that speed. Maybe it's just I got used to it or maybe something worst? What should I have the mechanic look at? (I'm already bringing it in to get winter tires changed)

 

Man I felt the same way about my G when I first bought it...then after a few months I guess I got used to it.

Then I got a LTCAI, which made it accelerate like a freight train...now I can't tell that is there either.
Many...many mods later It continues to feel this way. Back n forth back n forth.

This may not be what's happening to you, but then again it could be.

 

Yea I came from a Honda so I guess it was just a big contrast in the beginning but I got used to it... I just want to make sure though that's why I made this thread. I'm hoping it's not something bigger under the hood

 

I hope it's not anything major as well. But I suspect, unless the change is drastic, that it's just you getting accustomed to the pickup of the G.

 

Same thing happened to me, but sometimes I'll put it in 2nd or 3rd and let her rip and we're off. Hopefully no major problems for you, just my experience.

 

yea that may be it.... damn maybe i have to upgrade to an m3 or soemthing now haha. just wondering though, wut kind of potential problems would cause this?

 

computer learned some slow driving habits? you try "wringing it out" lately?

 

Hmmm could that be it? I started driving like an old lady(barely pressing the pedal at all) because of gas concerns... in my first month I was ripping it a lot but I couldn't deal with filling it up so much so I changed my driving habit.... Could this really be the reason it takes a bit longer to pick up?

 

disconnect the battery for 10 min and see what you think. The pcm will do a relearn and you might get a different response.

 

mine was the opposite - i drove slower when i first got it (average 18-20mpg). then i put on an axle-back exhaust (VROOM VROOM!), now i average about 17-18mpg. it goes like a scalded hyena, though.

 

Is there any other negative side effects of disconnecting the battery and doing that?

 

windows might get funky. you could try this ...

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

... or just drive "enthusiastically" for a while.

 

hmm this really intrigues me..... does resetting ECU also help with gas mileage possibly ? i'm getting like 11 mpg in the city .. and can an infiniti dealership or a mechanic do this for me? I rather have a professional do it so my car isn't f'ed up

 

Funny, I have the same year/model and I've been having the same conversation with myself lately. I've owned the car for 18 months, however. I decided it's just my imagination which led me to question if I want to buy an even faster car next. Seems like a slippery slope though

 

its just going to reset the ECU "learning". if something else is causing the poor gas mileage, you'll go back to that.
clean your throttle bodies? try some Techron fuel system cleaner?