I have tuned a number of 2015-17 F150 5.0L's and all have been fine, but one came back to me last week with lean codes and high trim numbers, rough idle for first 5-10 seconds of running, etc. I re-flashed with the stock tune and verified that engine runs fine with the stock tune.
I reloaded the HP tune and again it was running lean like before.
I created a completely new tune file exactly like the one that was giving me issues and everything appears to be fine.
This is the only vehicle I have had problems with and they are tuned exactly the same way.
Is it possible something was corrupted in the first tune file? Anyone encounter this scenario before?
thanks
Ron