Hello, I have been reading but have not found a solution to the problem. When driving and holding the pedal steady the car will not accelerate normally, it lags then suddenly will rapidly accelerate? if driven aggressively it will accelerate. the transmission was thought to be the initial problem so it was changed with a known good transmission and the problem is still there? I was thinking it could have something to do with the fly by wire throttle body? any ideas?

Thanks

 

anything is possible . have you done the basic checking of codes and throttle and gas pedal learning. apparently this is a very crucial thing with Nissan.