Any idea why my PCM wouldn't take an upload? I obtained my first read, modified fans/coolant only, uploaded to PCM, re-read to make sure it took. Second read states the modified temps but my scanner and fans (actions of vehicle) states that factory settings are still in charge. Ie. fans kicking on at 212 (factory setting). I even left vehicle with no batter/power over night.


Am I missing something. I hope I'm just missing a stupid easy step or something. Thanks for any help.


Thanks,
Slimguns