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Twells229 · 05-08-2016, 03:51 AM

I seem to have the opposite problem as everyone else who switches to e85 for the first time. I switched tonight, followed the exact instructions. I left my 91 uel tune until fuel trims went way high. Then I re flashed to e85 uel tune. Seems simple enough but after giving the ecu time to learn the new trims and getting the long term fuel trim to level out around -3%, the car is running really rough. It feels like it did when I had the uel without a tune. Felt great on 91 uel tune with oft, but now rough on e85. Also, I never had crickets until I switched to e85. Good lord those things chirp loud.

Sorry for the long post!

TL;DR: switched to e85 with oft, got crickets and runs rough.

05-08-2016, 03:51 AM	#1
Twells229 Junior Member Join Date: Jan 2016 Drives: 2015 Firestorm Fr-s Location: Nebraska Posts: 4 Thanks: 0 Thanked 0 Times in 0 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Running rough on e85 I seem to have the opposite problem as everyone else who switches to e85 for the first time. I switched tonight, followed the exact instructions. I left my 91 uel tune until fuel trims went way high. Then I re flashed to e85 uel tune. Seems simple enough but after giving the ecu time to learn the new trims and getting the long term fuel trim to level out around -3%, the car is running really rough. It feels like it did when I had the uel without a tune. Felt great on 91 uel tune with oft, but now rough on e85. Also, I never had crickets until I switched to e85. Good lord those things chirp loud. Sorry for the long post! TL;DR: switched to e85 with oft, got crickets and runs rough.