Originally Posted by
abssystems
Now your in my field of expertiese:)
first off I have close to 30 years as a A tech with ford motor as a shop forman I was around when we went to fuel injection Pcm controled
anyway it is true you can errase the (KAM) keep alive memory in a pcm
and a much faster way to do so is removing the positive battery cable and ground it out trust me this wil wipe out all memory in every processor on your car including the radio, why wait for the headlights to drain them, chuckles
Myold is correct in the fact small correction will be overcome with this process however your pcm is goign to relearn and go righ back to programed in (maps)
this is why if you produce little gas you may see a change that stays or you may get worse and worse milage as time passes
basically every 40 ( drive cycles) your computor " take stock of itself" per say
thus if you pop a check engine light and the condition doesnt occure again for 40 drive cycles it will turn the light off by itself
this is why after time the milage gets worse
so yes it is true the pcm can be cleared of stored data and then get better milage but i assure you if your making any quanity of good gas it wil be short lived milage gains
this is why flash chips exist they provide new data for the (maps) for the Pcm
when you bring you car to the dealer for a reflash your changing some of the factory (maps)
they say you dont need any electronics controlers?
I say bull dunk
I can drive my truck down the road and from the cab shut my injector pulsee width down to the point i shut the truck off >LOL
let me see anyone do that without electronic controls?