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Fuel gauge resistance 

 

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 Post subject: Fuel gauge resistance
Posted: Sun Aug 27, 2006 4:35 pm 
Getting Side Ways
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Ride: EF Futura Wagon

Location: Toowoomba
QLD, Australia

Anyone know the resistance of the standard EF fuel gauge?

I'm changing to straight LPG in the next few days and want to know the specs so I can make up a circuit (or just add a resistor) to the LPG tank gauge.

LPG tank is 0-90 Ohm. Petrol is...........

cheers
Scott

 

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Posted: Sun Aug 27, 2006 7:43 pm 
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Ride: 96 XH/97 EL

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EF/EL petrol sender is 10 - 176 ohms. The correct LPG sender you're looking for is 2 - 176 ohms.
I assume you're running the 3 scuba tank setup ??
The setup I'm running in my wagon isn't greatly accurate, due to the sender sitting in one of the tanks.

 

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96 XH Longreach 'S': LPG, Alarm, 3.23:1 LSD, Cruise, Trip Comp, ABS, Power Windows, Mid Series Dome Lt, Climate Ctrl
97 EL Futura S/W: LPG, Alarm, LED int Lts, Trip Comp, F/Lane Dome Lt, Climate Ctrl, T5 Conversion

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Posted: Sun Aug 27, 2006 10:29 pm 
Getting Side Ways
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Nope I have a single 65l which is going under the floor, with a new false floor replacing the petrol tank. When money permits I will add a second 65l tank to have a total of 130l lpg.

Hmmm I don't like it being 10-176. I'll think of something....

 

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Posted: Sun Aug 27, 2006 10:43 pm 
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Ride: 96 XH/97 EL

Location: South Coast
NSW, Australia

Well whoever's supplying your tanks should be able to get you the compatible senders ??
A bit of planning into the circuit setup for the tank sender/lock offs for switching tanks - also integrating this into the safety cutout - not too difficult though. An LPG variation of the XH outback ute setup.

 

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96 XH Longreach 'S': LPG, Alarm, 3.23:1 LSD, Cruise, Trip Comp, ABS, Power Windows, Mid Series Dome Lt, Climate Ctrl
97 EL Futura S/W: LPG, Alarm, LED int Lts, Trip Comp, F/Lane Dome Lt, Climate Ctrl, T5 Conversion

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Posted: Mon Aug 28, 2006 12:44 am 
Getting Side Ways
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Joined: 23rd Dec 2005

Ride: EF Futura Wagon

Location: Toowoomba
QLD, Australia

I'll just use an op amp circuit to double the resistance with a 10 Ohm leadup. Should get 10-180 Ohms depending on the resistors I use, which is just about perfect. If I had the two tanks already I can just use a 10 ohm leadup with the one tank sender in parallel with a 1000 Ohm resistor followed by the other tank sender in parallel with a 1000 Ohm resistor. That gives 10-176 almost exactly.

cheers
Scott

 

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