Working fuel strip resistance values.

Pukmeister said:
The OP wanted values between pins 1&2. :blast
Click to expand...

And I goofed.
Heater is 1 to 4. Sensor is 2 to 3.

The guys on AdvRider said that simply putting resistance across the sensor didn't work. It also needs the 2 meg bias.

My fuel strip packed up and refused to zap. I tried to open up the epoxy potted wiring connector but it shattered. So I've no clue what lies inside.

I'm hoping it's possible to replicate the old strip connections with the sliding float sensor.
 
I would think that in order to get a valid resistance reading the heater would need to be running when you measure the resistance of a working fuel strip. the resistance of an unheated strip will not be what the fuel computer is expecting. So I think a sort of break out lead is required to power the heater whilst allowing the resistance meter to be connected to the sensor pins. Or am I missunderstanding how this works?
 
That's a good point. We don't know what the resistance range is.
However on a full tank the heating effect can't be much. It's likely to remain at ambient or below if the tank has just been filled. Who knows how the electronics compensate for that.
The heater resistance value is needed so I can spoof that with a resistor.
The sensor circuit resistance at ambient is a start point. I can then work from there.


Sent somehow.
 
pins 1 to 4 (heater)= 36.5K
pins 1 to 2 (sensor) = 2.8K

I have just over half a tank of fuel.
 
I think what will be needed here is an op amp circuit to generate the voltage required by the computer with the input to the amp being a signal from the float valve. I dont think you will be able to archive this with passive devices such as resistors etc.
 
You may well be right. Im hoping that as the AdvRider guys were able to spoof a full tank with 2K that's a starting point.
My level sensor is 10 to 180ohm. It might be as simple as adding a 2K ballast though it doubt it's that easy.

Sent somehow.
 
Looks like the very thing I'm trying to develop. I wonder what input resistance range it uses.


Sent somehow.
 
40 euros for 2 resistors and a couple of connectors is a bit steep. See my post #8 this circuit does the same thing.
If I had a faulty strip I would start by substituting the 2k resistor for a 2k pot and see what happens.
 
Nippy Normans supply Touratech, Wunderlich, Desert Fox and many other makes of accessories.
You must log in or register to reply here.

Similar threads

Fuel strip resistance values
Replies
0
Views
807
Bendy toy
Fuel strips. Need to know resistance strip values in ohms
2
Replies
24
Views
8,741
Bendy toy


Back
Top Bottom