Ngauge showing E-91 on Flex Fuel tune

[grabber yote]

Filled up with E85 this morning and for the second time in a couple months my Alcohol % is showing E-91 after the learning process. Last time it did this I reloaded my tune and it dropped down to 82%. Anyone know what causes this? The E85 I get always tests between E80 to E85.

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[Nuked]

The alcohol percent calculation is dependent on the MAF curve tune. If that isn't spot on it will vary. IAT will affect the MAF reading as well.

 

[grabber yote]

I guess I need to send a log to Lund and see what's up. I want them to look at everything anyways since I installed my F-150 intake manifold and 170 T-stat. Coolant temps never go over 185 now when they used to be over 200 but my damn intake temps still hit the 140's with the PMAS.

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