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E85 sensor reading 100%

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Old Aug 22, 2019 | 11:07 AM
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Default E85 sensor reading 100%

I have an e85 sensor that’s reading 100%. I did changed the fuel Pump. Read fine after fuel pump swap. Drove the car around the block a few times after fueling it up and it was fine. Last night went to start it up and now it’s reading 100%. Changed sensor to 3 different ones, Changed the harness, checked the pin in the computer(which is fine) wiring going from sensor to computer is fine, and I tried a different power and ground source. Still reads 100%. Any thoughts on what’s wrong?

Last edited by LSXhawk; Aug 22, 2019 at 11:08 AM.
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Old Aug 23, 2019 | 12:59 AM
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Can we rule out you’re not running E98? What sensors are you using? How is wired? Where are the reading coming from? Specifics on the car?

Mine reads alcohol % through a ZR1 MAP and my dashlogic does the display on the HUD. Pretty simple set up. It reads exactly the same as HP tuners so it’s pretty damn accurate.
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Old Aug 23, 2019 | 01:55 AM
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Probably water in the fuel from when you fueled it up:

Last edited by CI GS; Aug 23, 2019 at 01:56 AM.
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Old Aug 23, 2019 | 07:33 PM
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Originally Posted by CI GS
Probably water in the fuel from when you fueled it up:
https://www.youtube.com/watch?v=XEPJo1FN32k

Great information
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Old Aug 23, 2019 | 10:23 PM
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I have a portable ethanol tester and test quite often is simple non electronic hand job so there’s no room for doubt and have found a couple of times 98/99 % contents engine loves it
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