Been running Mafless for a long time now. Was wondering what I need to reactivate in order to run Maf again.
Main reason being is cuz I'm tuned for 91 octane with 10%e85 and when I run 100% 91 fuel it runs richer.
Rather then switching between 2 tunes I'd like it to just make the adjustments.

Theres a good 1.5 AFR difference

 

first you need to reenable the maf haha... i just downloaded your tune... gimme a min

 

compare this and your original tune... i think i got everything..
i copied the factory PE table in there cause i dunno how you want it setup.

 

Cool thanks.

I'm hoping that will help with the fuel changes. If i'm running 10% e85 I have it usually cruises around 15.5 but when I put 100% unleaded it runs about 14.4-14.8 and that annoys me.

 

Hmmm, I don't think your MAF enabled/disabled has anything to do with your problem. I believe your trims would fix that issue, however you can't command 15.5 with trims enabled... IMO your best bet would be to reenable the trims and apply the lean cruise patch....

 

I'm already running COS3. If I apply the patch wouldn't I need to divert back to the GM OS.

I'm still wanting to enable the MAF to see if it helps me any on my MPG's. But I'm getting tired of needing to add or subtract 3%+- from my VE table to get where I want depending on the fuel I run.

 

The MAF will only compensate for airflow changes, not fuel composition... Did you truck come with E85?

 

No it's not flex fuel. but i've had best results at pumps running 10% E85. I figured the MAF would help a bit on days where the air isn't that great. I've seen it get richer on some days and leaner that same night. Unless it was my imagination.