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What coulda caused my fuel gauge to quit working on my 1995 jeep cherokee sport?

Fuel gauge stopped working after changing fuel pump

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Dear Josh Wambles,

Some of these units suffer with stuck floats in fuel tanks, so the best thing you can do is drain out your fuel tank properly, then fill it with water and then try and get a reading, as the tank is filled, the float rises, electrical resistance is altered and as a result, you get a reading on your guage. If filling with water and cleaning out the tank doesnt work, then im afraid you are going to be dismantling the device that is attached to the tank and you will be checking that; but just before you do, try removing the guage itself and putting a multimeter to the wires and see if you have a reading, if you do, your guage is trashed, get a new one. If not, then as said, you will be busy with the float and other components that are probably fitted inside the tank.

What can cause this?

Corrosion, running your car too low on fuel, busted electrical connections, water, sediment in the tank, rubbish fuel, bad maintenance.

I hope this is the fixya for you and I look forward to hearing how you get on, in the meantime, if you have any further questions, then do let me know and I will respond as quickly as I can.

Yours Sincerely


Posted on Feb 07, 2012

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Probably just a function of age. The gauge operates off of a float in the fuel tank and is connected to a rheostat that actually sends input to the instrument panel gauge. The body computer may also be involved.
Check the connections you can and if there is nothing loose or corroded learn to depend on the trip meter. If you know how far you can get on a tank of fuel that is probably more accurate than a 17 year old fuel gauge.

Posted on Feb 07, 2012

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The fuel pump and sending unit are both in the tank they should be replace at the same time most chy pumps are sold as a pump and module you should take it back to the repair shop

Posted on Feb 07, 2012

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