I just purchased a 99TL and everything was working fine with it. I replaced the battery the same day of purchase and now when I take it out for a drive the first time of the day it stalls one time after it warms up. It fires right back up and everything is fine afterwards. It does not stall during the drive but when you come to a complete stop. No check engine lights are comming on. Could it be from me replacing the battery? The ignition was already replaced on it.

 

Its most likely because you changed the battery and reset the ECU. There is supposed to be a relearn procedure, but it will learn by itself. in a small amount of driving. If it continues to do it after a few miles of driving then youmay need to look into something else