Hey guys, I just bought myself a 2011 g37 coupe, I have around 330 miles on it is there a reason why my engine lags, or whenever I drive in sport/tip tronic switching gears lags, is it because my engine hasnt broken in yet or what? What do you guys think is this with all G's?

 

mine also has a pretty huge lag during gear shifts (in DS mode) even after the break in period. Since it is not a dual clutch transmissoin, there is no solve for it..

 

if its a 7AT there is a flash update from the dealer, I'm not sure if it was just for the sedan or coupe as well.

 

Recently? Because I just picked up my car on the 28th

 

There is a couple of Technical Support Bullitin's out for lags/harsh 7AT transmissions:
ITB10-075 is for various issues including harsh 2-1 downshifts
ITB09-032b which has to do with 4-3 downshifts

You can find them here: Infiniti G37 Technical Support Bullitins

 

ecu flash from the dealer and grounding kit should resolve the issue.

 

Um, no offense but a grounding kit isn't going to do jack for something that is a problem with the transmission control program. I suspect that why most people think grounding kits help is that it takes long enough for them to install the kit that learned driving profile gets erased, same as doing it via the pedal method. There are a few things that a grounding kit might help, the primary one being alternator whine in an aftermarket audio system. But a grounding kit is not going to fix a lagging transmission or give you a horsepower boost.

 

 

My Coupe has no LAG but I drive it pretty hard.

 

my uncle came out of a 08 g37s 6mt and went to a 2011 g37x vert. when i tell you he is upset with the auto trans compared to the manual, its an understatement. he has been back to the dealer a few times b/c of this "lag", their last resort was to swap out the computer. probably will be the same as when he brought it it, he's just hoping that he had an extra troublesome tranny. good luck to those with this problem!

 

I've put 10,000 miles, over the last year, on my 2010 sedan and have experienced no lag, but I have read a lot of posts on the forums complaining about it.
I put most of the miles on at highway speeds and have done a lot of high speed passing on 2 lanes.
If I had experienced any type lag and the dealer couldn't resolve it, I would have got rid of the car immediately.

 

Um when did they come out with a X Vert??

 

um, my fault big guy...regardless he's got the same type of problem

 

MIght be a noob question here, but when you talk about the install erasing the learned driving profile is that simply b.c the battery is disconnected for an extended period of time

Im asking b.c i broke my car in fairly nicely, and was wondering if i could just erase the LDP by just disconnecting the battery for while so i can drive hard from the get-go when it starts to learn my driving.

 

Not to derail the thread too far, but yes you can. You can also reset the stored parameters with some carefully timed pedal presses. Search around, there are a couple of thread on it. One thing to note is that the learning process is a long term thing. All references I have seen imply thousands of miles and it is continual. So, if you do the reset, the go drive hard for the weekend and then sit in stop and go traffic all week, it's not going to do much good. It is trying to "learn" what the most likely thing it needs to do is for a given input by the driver. So your best bet is to drive it consistently.