I have a 2007 G35X I swapped the motor with another 07 G35 put everything together the car started up fine then after 5 minutes of the car idiling it started surging and I had no throttle response I have tried multiple time to do a throttle body relearn and it will not take I have done it manually and with a snap on scanner neither ones will take any suggestions or any help would be greatly appreciated also the car had a hard time starting and once it starts only runs for a few seconds then shuts off. Kind of making me believe throttle bodies might be bad.