Is it safe to flash to non FF tune with 18% E in tank?
 

Not sure if the tune is just Non FF or non E85 tune, but I need to flash back and go to the tune so I can plug my o2 sensor back in for emissions.

Let’s assume that it is non E85: E18 would be fine right?


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Just go for a long drive and burn off some more. Should be OK with 18 anyway really.

Anythong under about 30% ethanol will be fine thier is a lot of fueling adjustment and more E means more knock resistance and if you on a petrol tune it will jave low ignition advance compared to an ethanol tune

lol, just out of curiosity, how did you figure it's 18%?

Most fuel has 10-15e content already in it. So that would do much. Watch your fuel trims and keep from going wot till your FTs stabilize

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Maybe he has a gauge?

Not likely if he is using oft. Maybe test strips

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I have EcuTek :D



I have a gauge from DT.

Do you have a flex fuel tune? If so this whole thread was for not lol [emoji1787]

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He had flex fuel. Needs stock tune for emissions

Ahhh okay that makes sense.

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I've driven for about 10 miles on e85 with the stock tune when I had some issues flashing the e85 tune. Was fine. Fuel trims jumped to 20-25 percent, but I just kept the rpms low and tried to stay off the throttle. No problems, not even a CEL.

Just don't romp on it, keep it in closed loop and ecu should be able to compensate fine based on o2 sensor feedback.

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What do you mean by keep it in closed loop? Sorry.