Hello,
My truck had the motor replaced with a non flex version, the PCM was replaced with a non flex but it was programmed with the flex tune.
I was able to change the injector scaling and it drives much better but there are a few things that are still not great, warm starts are rich and it take a bit to start and some slight hesitation after cold starts.
I was hoping to find a non-flex tune and compare the differences, any help would be appreciated.