I've read in several places that you should disconnect the battery to kill the memory in the PCM (ECM?) when replacing the ICM, ICV, or other parts and sensors. This apparently allows the computer to "re-learn" its parameters for engine management with the new parts.
Does it really work this way? Seems the computer would always be learning and mapping due to changing conditions anyway. A new part, like an O2 sensor, would just be woven into the solution.
Thoughts?

 

Yes it really works that way.

 

can you just pull a fuse to a ECM .

 

There are at least two, and most likely 3 processor fuses on whatever he's driving
It is the KAM processor feed fuse that needs to be pulled
They always told us in Screwell to use the scan tool to clear codes
Forcing the ECM to do a bunch of re learns is not detrimental but not good for it either IMO