ppreston
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ppreston
What would cause a fuel guage not to work on a 1991 Ranger. Also Tach jumps up and down at idle. Just replaced the DIS module with codes 18 and 88. All codes are gone. Ranger has a 2.3 engine
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Fuel guage don't work on 1991 Ranger
]What would cause a fuel guage not to work on a 1991 Ranger. Also Tach jumps up and down at idle. Just replaced the DIS module with codes 18 and 88. All codes are gone. Ranger has a 2.3 engine[/quote]
Cargo Master
Joined: May 2004
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Does it not work at all? No reading of any kind?
Might be wiring, check for voltage at fuel sender connection at fuel tank.
The sender is a variable resistance unit. High resistance high level, low resistance low level. Check resistance at fuel sender connection at fuel tank.
Might be wiring, check for voltage at fuel sender connection at fuel tank.
The sender is a variable resistance unit. High resistance high level, low resistance low level. Check resistance at fuel sender connection at fuel tank.
Moderator
Joined: Jan 2004
Posts: 13,851
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From: SW Va
I like the wiring & ground ideas.
If you ground the instrument panel end of the sending unit wire at KOEO, the gauge should indicate Full, if it's working ok.
If not suspect the instrument panel gauge or a connection there.
If you ground the sending units wire at the tank end & the gauge goes to Full, that'll tell you that the wiring back to the instrument panel is ok.
If you have to replace the sender/pump assy, it's said that it's easier to do, by removing the tailgate to make things lighter, unbolting the bed, fuel filler hose, taillight connector & sliding the bed back to rest on the rear tires & saw horses, to access the pump, than draining & dropping the tank.
Fuel with a high sulphur content can corrode the fuel level sending unit wiper & cause problems.
Chevron claims their Techron Concentrate Plus can remove the corrosion & wake up a sending unit.
So, maybe a 20oz treatment in the tank at the pump, before filling up with Chevron, Texaco, CalTex, or now Shell, would be worth a try, as those fuels have a PEA based ad pack, so the added 20oz Techron will raise the treat rate 10X above pump gas alone & can usually tidy things up in one treatment.
If it doesn't wake up the sending unit, it'll clean up the fuel injectors, intake valves, piston crowns & combustion chambers, so at least you'll get some return on your investment!!!!
Let us know how it goes.
If you ground the instrument panel end of the sending unit wire at KOEO, the gauge should indicate Full, if it's working ok.
If not suspect the instrument panel gauge or a connection there.
If you ground the sending units wire at the tank end & the gauge goes to Full, that'll tell you that the wiring back to the instrument panel is ok.
If you have to replace the sender/pump assy, it's said that it's easier to do, by removing the tailgate to make things lighter, unbolting the bed, fuel filler hose, taillight connector & sliding the bed back to rest on the rear tires & saw horses, to access the pump, than draining & dropping the tank.
Fuel with a high sulphur content can corrode the fuel level sending unit wiper & cause problems.
Chevron claims their Techron Concentrate Plus can remove the corrosion & wake up a sending unit.
So, maybe a 20oz treatment in the tank at the pump, before filling up with Chevron, Texaco, CalTex, or now Shell, would be worth a try, as those fuels have a PEA based ad pack, so the added 20oz Techron will raise the treat rate 10X above pump gas alone & can usually tidy things up in one treatment.
If it doesn't wake up the sending unit, it'll clean up the fuel injectors, intake valves, piston crowns & combustion chambers, so at least you'll get some return on your investment!!!!
Let us know how it goes.
