Flex fuel sensor issue

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Posts: 9
Joined: Tue Dec 29, 2020 11:45 am

Flex fuel sensor issue

Post by Westillo »

I parked my car with full tank of ethanol for a week, went to start it it didnt start so I plugged in laptop and saw that fuel comp was 0. So i figured my flex fuel sensor went bad and bought new ac delco sensor installed it and same issue. Under errors it says too fast. I think the ecu is getting higher than 155hz because if i raise the error threshold to 200 hz fuel comp will read 100.
Anyone ran into the same issue?
Posts: 25
Joined: Mon Jan 27, 2020 7:40 am

Re: Flex fuel sensor issue

Post by nmerdan »

Some flex fuel sensors will output 180-190Hz when the fuel is contaminated (water, salt, etc.).
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