unsure about my flex fuel reading! e85 reading low!!!

[kielcivic]

hi guys
fitted a jti flex fuel sensor and when i put vp e85 in the reading only went up to 65 percent
i fully drained tank and lines there may of been a tiny bit v power in the filter but that only
shouldnt i be seeing 85ish
any ideas guys?
thanks kiel

[secure]

What you see when you get only gasoline?

[RICE RACING]

Its not an 'alcohol' content sensor for starters, eg, get some petrol and put water in it and put your Ethanol content sensor to action and see what it tells you

Do they read low? I cant tell you but I do know that they are confused badly by water content

[TimH]

E85 can be legally as low as E60 from what I've heard.

[stevieturbo]

E85 can be legally as low as E60 from what I've heard.

You'd like to hope that VP branded expensive race fuel would be what it says though ?

Of course without doing lots of testing, who's to say whether it's the fuel, or the sensor..or its calibration.

[TimH]

It is true to say that the sensor is "fooled" by water - shame really.

And, yes, would agree that VP race fuel ought to be 85% though!

Calibration should be Syvecs default for this sensor - 50Hz=0% and 150Hz = 100%; worth checking I guess.

[kielcivic]

That's tim I will check that in the syvecs
Iam seeing 7percent with normal pump fuel

[kielcivic]

That's tim I will check that in the syvecs
Iam seeing 7percent with normal pump fuel

[TimH]

7% is normal for Vpower or Tesco Momentum.

95 RON is usually around 3 or 4%.

[stevieturbo]

Can you get some other drums of E85 to sample ?

Ultimately as long as the fuel vs sensor reading is consistent, you'll be tuning for it anyway so a different reading from what it should be isnt a big deal.

But the big question is why is it so different, especially when a race E85 you'd like to think should be a solid 85%