I had a Livernois tune on my 2010 Ecoboost MKS and I was very happy with it. When I obtained a 2016 Mustang GT, I got a Livernois tune for it and was equally impressed. I now have a 2018 Mustang GT so I obtained their new tuning device and got their flex fuel tune....a tune that allows me to run E85, 93 or any any combination of the two. It "learns" what is in the tank and adjusts AFR, timing, etc. to maximize performance for the fuel being used.
Unfortunately, my 2018 Mustang would not learn the E85 fuel so it would not adjust the engine parameters. Consequently, I got a CEL showing too lean on both banks. I spoke with Jake and Anthony. We tried numerous things to fix the issue to no avail. Never ONCE did they blame me or the car. They bent over backwards to address my concern. Andy and Dan got involved and we tried a couple of tune updates that didn't make a difference. Finally, thinking outside the box, they found the issue and got it corrected.
My car was a bit of an anomaly. Shortly after getting it, the dealer did a PCM update and the strategy code changed to somewhat of a one-off code. That code simply would not accept all facets of the flex tune. Dan did his magic and now the car runs great on E85, 93 or any combination. The engine parameters adjust appropriately and the car runs like a scalded dog on 93 and like a raped ape on E85.
I want to thank the Livernois team for taking ownership of this problem and providing great customer service! I could have driven Anthony crazy with emails and calls. However, he always responded quickly and called me several times to provide updates on what they were doing to correct the problem.