pulling the battery cable will work every time but you may lose the radio presets and clock settings, not to mention upsetting the alarm if you have one. To reset the memory in the ECU, pull the 15 amp EFI fuse located in the driver's side kickpanel and wait 15 seconds before replacing it. It's a good idea to record any stored trouble codes prior to clearing them. With the ignition on but engine not running, jump terminals T and E1 in the check connector under the hood and watch the check engine lamp. I believe there's a link to this process and a description of the codes somewhere on this board.
Either way works. Do his and you won't lose clock and radio settings. My battery terminals are quick-disconnect, so it's faster for meto do that. All you have to do to reset the ECU is kill power to it for around 20 seconds.</font>
Resetting the ECU clears the stored codes and sets the default values back into the ECU. If your ECU had a stored code that ultimately affected the way it adjusts fuel mixture, clearing the codes may put it back into normal operation. It's very likely it won't have any affect on the way it runs though. Under some circumstances, like if the MAF meter or TPS sensor fails, it will go into a limp-mode operation where it compensates for the absence of another component. This mode is generally indicated by an illuminated check engine light and is designed to prevent you from being stranded.
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