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Engine, Exhaust, Transmission Discuss the FR-S | 86 | BRZ engine, exhaust and drivetrain.


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Old 07-17-2019, 09:13 PM   #1
kev0
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Added E85. Ethanol Gauge didn't change?

Using Moto East's Flex fuel kit. I've been tuned for it as well. I added 11 gallons of E85 for the first time and started up my car. The car drives fine but my digital ethanol display gauge didn't change. Drove 2 miles home after that and it still didn't change.

Any suggestions? :/
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Old 07-17-2019, 09:21 PM   #2
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Keep driving, it takes more than 2 miles
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Old 07-17-2019, 09:25 PM   #3
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Keep driving, it takes more than 2 miles
Oh okay. I didn't know it takes time to change. I thought it would be an instant reading. Thanks
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Old 07-17-2019, 09:33 PM   #4
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Yea on my oft it takes almost 10 miles for my fuel trims so change.
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Old 07-17-2019, 09:42 PM   #5
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Yea on my oft it takes almost 10 miles for my fuel trims so change.
I think they recommend 75 miles for the tune to adjust fully. I got 5gallon of e85 to test then barely got to drive it lol

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Old 07-17-2019, 11:14 PM   #6
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The ethanol percent should start to change on guage in first few e of miles. Two might be a bit short but if you do 5 and nothing changes its a bit unusual


It may depemd on the port to direct injection ratio as you have to put your sensor in either the di or the port feed line. If your tune uses a lot of di down low put in di if it uses a lot of port put it in port line.


If its rear 02 flex kit log the rear 02 sensor volts, close to 0 volts means zero ethanol, close to 5 v means close to 85% ethanol in most cases
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Old 07-17-2019, 11:51 PM   #7
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What is your ecutek log seeing?

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Old 07-18-2019, 12:00 AM   #8
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What is your ecutek log seeing?

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It started reading correctly after about another mile of driving!

Thanks all.
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