I have been at this for days. I'm running a P59 on a turbo SBC and have been for months with the 2 bar enhancement. About 3 weeks ago I swapped to 3 bar and the car still ran fine. I have a gas station 20 miles me that has e85 at the pump so I upgraded to twin pumps, paid out the rear for some FIC 1200cc injectors and installed the fuel composition sensor. Enable flex fuel in the tune, re flashed thinking I was about to play and..... no content reading. I quickly figured out that I couldn't just enable flex fuel and go to work tuning. After some research I downloaded a 2002 Tahoe tune that has flexfuel enabled. I went back to my PCMs stock tune and did the segment swap for the engine and fuel system as well as the trans segment(4l80e) from the file I used way back whenever. I did the 3 bar enhancement, copy and pasted everything from my last tune and did a write entire thinking NOW I"M GOOD TO GO.....NOPE. I did now have fuel composition reading which seems close. (had about 3 gals of 100% gas and then added 5 gals of whatever the e85 mixture actually was from the pump.)
anyway, the car wouldn't fire off and run for more than a 2 or 3 seconds. I ended up going back to the last NO Flex tune and the cars runs fine other than was about 15% lean. added 15% across the MAP and was good to go. Figured maybe I had a file so I searched for another flex fuel download and today went back over the whole process again with the same results.
I don't know what do at this point other than go back to my last working tune and stay on 92 with low boost.
The setup is a 383 SBC with DBC, 3 bar map, FIC 1200cc injectors with their data, 4l80e trans, twin 450lph pumps and a pair of 70mm turbos. the car runs fine on the LAST NO FLEX tune below.
The 1479191873 tune was the flex fuel segment donor.
Flex Fuel 3 was the 3rd attempt(more like 30th)
flex test 3 log was me trying to fire up on the FF3 tune.
For whatever reason the WB02 refuses to stay ready so that data is junk mostly but look at the commanded EQ and especially the barn injector pulse. don't make sense to me.
I open to any and all suggestions. Thanks in advance.