Fwd: '91 CQ ran out of fuel, gauge at 1/4, no autocheck or E

[Huw Powell]

 From my vague memory of analyzing the circuit, yes.

They actually read the physical position of the fuel gauge, IIRC.

You could test this by swapping a test resistor for the tank sender 
(value picked based on manual, go for 1/2 tank, say) and seeing what it 
does to the trip computer predictions.

You could also try a resistor equivalent to "almost empty" to see what 
the autocheck does.

- Huw

On 8/15/2015 6:19 AM, Christopher Gharibo wrote:
> Just a follow up to the 1/4 fuel gauge reading and running out of fuel being attributed to a fuel tank sticky float:
>
> Do the autocheck and trip computer "E" low fuel warnings also run from the same fuel tank float?
>
> Thank you.
>
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> Begin forwarded message:
>
> From: Christopher Gharibo <cgharibo at usa.net>
> Date: August 9, 2015 at 8:46:10 AM EDT
> To: quattro at audifans.com, 20v at lists.20v.org
> Subject: '91 CQ ran out of fuel, gauge at 1/4, no autocheck or E
>
> I have a '91 CQ with fuel gauge, autocheck and trip computer that have always worked well in warning me of low fuel.
>
> Yesterday, the Coupe ran out of fuel. The gauge was at 1/4, the "distance to empty" on trip computer was at 70 miles. The autocheck low fuel yellow light came on as the car was stalling.
>
> Any thoughts?
>
> Thank you.
>
> CG
>
>
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