Hey all, just purchased some new spark plugs for my Tahoe and am questioning one step. The instructions indicate that I should disconnect the battery for at least 30 min so as to allow the Engine Control Module to reset itself so it can "relearn" with the new plugs.

Questions:

1) Has anyone heard of this? If so does this seem right?
2) Even after 30 min I noted that the radio still has all of its presets, like it never lost power, would this be the same for the ECM and if so how long should it be unpowered?

Thanks

 

The best way to reset the modules (including ECM) is to disconnect the possitve (+) battery terminal and touch it to the negative (-) terminal for a few seconds, this will drain the voltage from the system.

 

thank you