Buying aftermarket battery

[nookandcrannycar]

Originally Posted by CTScott

Chances are it is just a coincidence and that no damage was done. There is a TSB about running rough after disconnecting the battery that pegs the throttle body needing cleaning as the culprit. Disconnecting the battery clears the short term fuel trims, so the ECM has to do some relearning. If the ECM got used to a dirty TB, it can take quite a while for it to be happy with it again.

Thanks! It is a little better this morning. While I was at Wal-Mart getting the new battery the four words 'ECM needs to relearn' kept running through my head, so I wonder if I skimmed that thread at some point. Lippitt posted a link to my other post about this and I followed that to two links posted by Altitude...one of which brought me to a post by yaris-me that reads "run a good fuel system cleaner". I know that thread wasn't specific to idle behavior after a battery disconnect, but if my idle doesn't return to what it was before the battery replacement would 'running a good fuel system cleaner' help my specific idle issue? If so, is there a 'good fuel system cleaner' that you would recommend?