Faulty gas sending unit

One of two things: either the gage itself is malfuntioning or the float/sending unit in the gas tank is failing. Disconnect the plug at the tank for the sending unit, pick up a new sending unit and attach it to the plug without taking the old unit out of the tank. Then operate the float up and down on the new sending unit. If the gas gage reads correctly when the float is all the way up (full) and all the way down (empty) the old sending unit is probably bad and should be replaced. If there is no difference when you connect the new sending unit, the gage is probably bad. Then you can return the new sending unit (as long as the auto parts store allows returns of electrical parts) and buy a new gage. Install the new gage and...happy motoring.

YOU HAVE A FAULTY FUEL LEVEL SENDING UNIT IN GAS TANK YOU HAVE TO REMOVE FUEL TANK TO GET TO THE FUEL LEVEL SENDING UNIT.

this problem is caused by a defective gas gage sending unit, the sending unit is located inside the gas tank, the gas tank must be removed to replace the sending unit.

The problem is either a faulty fuel sending unit located inside of the fuel tank, the wiring between the fuel sending unit and the fuel gauge, or the fuel gauge itself is malfunctioning.

A good repair shop can find out for you which one is at fault by dis-connecting the wiring connector to the fuel sending unit and then use an adjustable ohms box to simulate the fuel sending unit, and the fuel gauge should read at a certain level of fuel according to the amount of ohms being put through the wire.

The gas tank sending unit has a float on it to register the amount of gas in the tank. The float is probably faulty which will cause erratic readings and is a fairly common issue with some GM units. Replacement of the sending unit should resolve that issue. As far as the coolant temperature gauge, it could be a faulty temperature sending unit or a thermostat that is stuck open or someone removed the thermostat. This will cause the engine to never reach operating temperature which in turn makes the engine run rich and can clog cat. converters and destroy some sensors.

could be faulty gauge or sending unit in the tank. if you can get ahold of a scan tool, see if the fuel lvel reading on the scan tool agrees with the gauge. if it does than you have a faulty sending unit.if it does not than you may have a faulty gauge.

If you tank has gas and your guage doesn't read the gas, then the sending unit is bad or relay or fuse for sending unit is bad.

This caqn be causede by bad wiring, bad sending unit, or fault on the instrument cluster (faulty gauge or bad voltage regulator.

Follow the instructions on website below:

Repair Your Fuel Gauge

HI, the oil pressure sending unit may be malfunctioning at this point. this will cause erratic readings. if your oil level is proper and there are no apparent oil leaks, you will need to replace the oil pressure sending unit. this will fix the erratic oil pressure readings.

Concerning the gas gauge. this device also has a sending unit that sends the correct fuel level reading to the gas gauge via wire transfer. this sending unit is located and attached to the fuel pump assembly inside the gas tank. replacing this device will fix this issue as well.

Please rate and god bless:)

to the right , i am assuming to the "full tank" reading. am i right?

if i am right, the wire from the gas tank is sending a full tank signal what ever the content of the tank.

meaning the wire is shorted to ground.
or the sending unit is faulty. there is a short to ground reading between the sending unit.

you can test which one is faulty. remove the wire from the sending unit. observe the gauge. if the gauge would go to " empty" then the culprit is the sending unit. if it stays on " full tank", then the wire is faulty.

WARNING: GASOLINE IS EXTREMELY FLAMMABLE. BE VERY CAREFUL IN HANDLING NEAR THEM.


tnx 4 using fixya,

drcool