BlackBear - when SpyShops mentions those with the Range still getting failures compared to not seeing those tuned have failures… does this apply to what you guys do? Tune vs. just a Range AFM override?
How does the tune differ from what the Range does?
Thanks in advance!
With the Range you have to keep it plugged in for it to keep AFM disabled, we are actually programing that feature out of the ECM. With AFM there are a lot of variables, timing with when you decide to disable it versus how long you have ran the vehicle with AFM, also vehicle year, the 07-13 years AFM was at its worst, the 14 and newer vehicles they reworked the system so it is typically a fuel saver but people still cant stand it or report issues.
I have had my 14 5.3 tuned by Justin for years and have had AFM disabled. We put it back to stock a few months ago. The way it shifted and throttle response was not fun with the stock tune, and the sound and the way it felt when AFM engaged drove me crazy. I only noticed a mile or maybe 2 mile improvement, so it was not worth it to me to keep it on. I want smiles per gallon