CuppT wrote:I did this when i first bought my truck because of the problem with L99's. I know the fuse numbers do not match up, but you pull the two fuses for the ECM. I think they are marked EMC and ECM Battery or Power. I will take a look in the morning and let you know for sure.
If it works or not i am not sure because i did not do a before and after test. i just used up all the crap fuel the dealer put in replaced it with 93 oct and reset the ECM.
Sounds logical to me. Please let me know what #'s they are and I will try it. All I use is 93 but, like you, I don't know what the dealer put in.