I have just bought an mk indy and it didnt have a fuel gauge but has the wiring etc for it.

The fuel gauge I have bought is a VDO fuel gauge and the range is 3-180ohms I couldn't get it working but I have measured the fuel sender float arm and it ranges between 20-400ohms so obviously I am going to have problems.

I set the arm to around 100 ohms and also measured it the same at the output on the wiring to the gauge but when I wire the gauge in it does not read even thought it is a 3-180hms gauge?

I plug in an old gauge with an unknown range and it goes to the maximum level even when putting the float arm to its maximum and minimum it still stays the same.


So theres the brand new gauge saying 0. Theres an old gauge saying full and a fuel sender that has a massive range.



any ideas?

Please update your profile with your location.

This is an example of a seemingly simple elecritical problem that is best investigated/diagnosed in person by a knowledgeable person.

Else it a lot of guesswork and assumptions.

PS im in sw herts if that is close to you.

I've had this with my car.

I measure the voltage drop across my fuel Sender using ADC and then drive a transistor with the resistor range to control the Gauge

There maybe anologe ways using op-amps but I'm more digital and I used a PIC.

quote:

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Originally posted by Huttojb
I've had this with my car.

I measure the voltage drop across my fuel Sender using ADC and then drive a transistor with the resistor range to control the Gauge

There maybe anologe ways using op-amps but I'm more digital and I used a PIC.

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