[chondo]

Hey all, hoping I can get some insight not sure what happened here.

Have been running the stock e85 tune with oft on stock 2018 brz for a couple years without issue. A week ago I got an oil change and state inspection at a local shop.

2 days later Drove it a few miles then tried to floor it and it stops accelerating and turns off. Tried starting it a couple times and car shakes for a bit and turns off (like choking?). Checked Fluids and all looked good from what I can tell.

Had the oft tablet with me and it showed no cel codes and the same e85 tune was loaded. ReRan the same tune and it started up, chokes a bit but gave it some gas and it settled down. Has worked fine ever since.

The shop said they only read the ecu for errors and don’t make any changes. Could the tune have gotten corrupted somehow and was fixed when I reloaded it? Should I post logs (noticed no issues since)? I didn’t take it back to the shop yet, should I?

Timeline/cliffs
— tuned to e85 from regular gas on the previous fill up
— 30 miles on current fillup (filled from same pump as previous)
— get oil change and inspection
— ~10 miles later car breaks down when flooring it
— ran same oft e85 tune that was already loaded
— no issues for week and a half normal and hard driving ~100 miles