metroplex
Mr. EcoBoost
- Joined
- May 10, 2017
- Threads
- 5
- Messages
- 33
- Reaction score
- 3
- Location
- Detroit, MI
- First Name
- Charlie
- Vehicle(s)
- 2009 Cobalt SS/TC, 2017 Fusion Sport, 2018 Explorer
- Thread starter
- #1
For those running a real flex fuel tune, how has it worked? Are you logging LTFT's by any chance? The reason I ask is that I noticed the EcoBoost engines (2.3, 2.7, 3.5) run a different type of primary wideband sensor where the flute holes are all aimed downward. On the actual FFV/Flex Fuel Fords (Coyote F-150, 3.5L N/A Explorer), the primary widebands are fluted the traditional way.
I'm having the same issue with a 2.7L EcoBoost. I've tried all kinds of settings, resetting KAM, driving 40+ minutes but it will NOT mature the AFR stoich. It will adjust/compensate for up to full E85 but it will never mature which results in LTFT never learning/producing data and I believe this impacts OBD2 readiness as well. So if I run a mixture of E20-E60, it will give me wildly erroneous inferred AFR readings and weird estimates of ethanol content. Full E85, it will hover around 9.80 AFR but it will never mature as well - but it runs great and I don't have any performance issues. However, until it matures, it will never produce LTFT data and I think it impacts OBD2 readiness as well (O2 sensor readiness, etc...)
I think I narrowed it down to the type of upstream O2 wideband that the EcoBoost engines run but I thought I'd check in with the 2.3 Eco Mustang owners to see if anyone's got any success with a FF tune. I saw that Lund has a flex fuel tune in another thread but most people probably aren't logging Inferred AFR Status or Inferred AFR Source, but if it Matures instead of being Actively Learning, you'll see LTFT being produced.
I'm having the same issue with a 2.7L EcoBoost. I've tried all kinds of settings, resetting KAM, driving 40+ minutes but it will NOT mature the AFR stoich. It will adjust/compensate for up to full E85 but it will never mature which results in LTFT never learning/producing data and I believe this impacts OBD2 readiness as well. So if I run a mixture of E20-E60, it will give me wildly erroneous inferred AFR readings and weird estimates of ethanol content. Full E85, it will hover around 9.80 AFR but it will never mature as well - but it runs great and I don't have any performance issues. However, until it matures, it will never produce LTFT data and I think it impacts OBD2 readiness as well (O2 sensor readiness, etc...)
I think I narrowed it down to the type of upstream O2 wideband that the EcoBoost engines run but I thought I'd check in with the 2.3 Eco Mustang owners to see if anyone's got any success with a FF tune. I saw that Lund has a flex fuel tune in another thread but most people probably aren't logging Inferred AFR Status or Inferred AFR Source, but if it Matures instead of being Actively Learning, you'll see LTFT being produced.
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