P2177 system too lean off idle

[Wastegate13]

Mods in sig. Never threw a code on my pump gas tune but within a mile of driving on my first e85 fill car threw a cel for p2177. Thinking maybe a fluke being the first fill I cleared and went about my business. Car drives fine and is now on its second tune revision. Mentioned it to sneeky and he didn’t say anything about it but it’s come back about 4 times now. Anyone have any insight? Normally I’d suspect vacuum leak but coinciding with me switching fuels has me thinking otherwise.

 

[Diggs24]

clear codes
start logging
fire it up
let it idle for amin
go for a quick drive
stop logging
post log

 

[Wastegate13]

Will post log when I get home.

 

[Diggs24]

stft too high i bet. pretty sure thats on his standard logging parameters list

 

[Wastegate13]

https://datazap.me/u/wastegate13/log-1644763473?log=0&data=7-10-11-38

 

[Diggs24]

It isn't compensating for the stoich of the ethanol.

 

[Wastegate13]

It isn't compensating for the stoich of the ethanol.

Which is kinda what I figured. Now what do I do about it?

 

[Diggs24]

Complain.