firefox19

Hey guys,

I have been following this forum for quite a while and always found solutions to the similar problems which I have encountered in the past but can't seem to find a solution for this one. I had a G37s 2008 in the past and I have upgraded to G37 2011 IPL so I know how the G37 should take off or when you floor it but I have been having problems with the acceleration lag, Ill try to be as clear as I can and I hoping if anyone can please help me out.

1. All my gears are shifting up and down fine, no engine lights but when I try to floor it, it seems like there is no aggressive take off.
2. Even at higher speeds, when I try to floor it to pick up speed to change lanes or whatever, it is not very responsive like it seems like the car is sleeping and wakes up and slowly increases the speed but forget to go higher rpms.
2. Car does not accelerate to higher rpms, my gear automatically change between 2000-3500 rpm max.
3. Even when I try to use paddle shifters to take off from stop position, it does not hold on to 1st gear or 2nd gear and automatically smoothly shifts to higher gears and even if I try to downshift to lower gear it won't let me downshift. 4th gear is the minimum it goes to unless I try to really slow down but that does not help.

I tried reading many threads on this forum, I tried resetting my ECU and some people suggested to get ECU update from the infiniti dealership which I will do for sake of it even still there were mixed reviews of people saying it did not work for them. Those threads were date back at 2010-2013.

I am hoping if someone can please chime in and help me out thanks alot in advance to all!