A quick background.
2014 ZL1 E67 BTR3 cam, pullies, about 16 psi boost on stock heads, return fuel system.
So I had the car tuned pretty good in OL running on E80. It would be close to 1.00 lambda cruising in OL whether in MAF only or SD. Then I ran out of E85 in my drums, so I filled up with 93. I reset the fuel trims at the gas station and cruised for about 20 minutes to let it all stabilize. Using the Special Functions in the scanner I forced OL and it was way rich.
Attached is a scan of me cruising in CL, then about half way forcing OL for a bit, then back to CL.
My question is why isn't the Flex sensor adjusting the tune? I would expect a few percent difference, but 15% rich is crazy.
Attached also is the tune I'm running. Don't beat me up too much, it's a street tune. I'm concerned with why the sensor isn't adjusting under cruise conditions.
I see in the log that it recognised I went from E79 to E37 after the fill up. Not sure why the PID above is still at E78 or even if that PID is relevant.
I also see that the AFR is still reading 10.1895, this is strange since the PID saw the reduction in E. I suspect this is the culptri, but why?
Can you guys give me ideas to check on this thing? Thanks for the replies in advance. - Mark
HP Tuners upload RICH OL.hpt
RICH OL.hpl