The other day I was turning onto a road and my engine cut completely off. I tried to restart the car and the starter grinded like the car was still started. I cut the car completely off and started it back up, but then the service engine soon light constantly stayed on. I called up Infiniti to get an appointment and they told me to bring the car to them and the would give me a loaner car (04' G34X w/ 188 miles on it).

Anyway...Inifiniti called me the next day and told me the problem was with the throttle body and it would have to be replaced. Thank god for warranties because the total bill was about $900). I finally get the car back and it doesn't feel the same. It actually feels slower now and doesn't pull anything like it used to. Is this because they had to reset the ECU? If this is normal, please let me know. Thanks!

 

Reset the ECU and perform the Air idle procedure.