Fuel gauge acting up!

Most likely the fuel pump try this, have someone turn the key on as you bang on the tank with a dead blow hammer or a solid hunk of wood if the engine starts drive it to where it will be repaired before you turn it off. I hope this helps. Take care.

Check for 12 volts at the orange wire on the fuel gauge. If missing check instrument fuse and associated wiring. If present do the following checks:

1. Remove gauge. Ground Y/W wire of fuel gauge sender located at bottom of gauge. Turn ignition switch ON.

a. Fuel gauge must indicate FULL. If gauge indicated FULL, gauge is functioning correctly and go to step 2.

b. If gauge did not indicate FULL, proceed to step 3.

2. Set MULTI-METER to resistance scale to measure the resistance of the sending unit. Place one probe on Y/W and the other probe on a good ground.

a. If fuel tank is full, the reading should be 40 ohms. An empty tank should have a 240 ohm resistance. A half full tank will be pproximately 97-118 ohms.

b. If a very high resistance or infinity is indicated on the meter, the sender may be "open" or not grounded. Check that sender and fuel tank are grounded by placing one probe of Multi-Meter on sender ****** and the other probe on crankcase. Meter must indicate one ohm or less. Replace sender if one ohm or less was present. If a higher resistance is present, check for poor connection on ground wire.

For a 2008 Touring bike with the ignition switch turned to IGNITION the fuel gauge is connected to +12 volts. Current flows through the gauge and the variable resistor in the fuel gauge sending unit to ground. The sending unit float controls the amount of resistance in the variable resistor. Inoperative gauges may be caused by several different circumstances: the sender or fuel gauge may not properly or sufficiently grounded; there may be a malfunction in the sender or in the fuel gauge; there may be a broken or disconnected wire from the ignition switch to the fuel gauge; there may be corroded connections at the fuel gauge.



Test the fuel gauge system by FIRST removing the gauge, THEN ground the fuel gauge sender Y/W wire located at the bottom of the gauge, turn the ignition switch to IGNITION and the fuel gauge must indicate FULL in which case it is functioning correctly in which case set a multimeter to the RXI scale and measure the resistance of the sending unit by placing one probe on (Y/W) and the other probe on the motorcycle ground or bare chassis point as a ground. If the fuel tank is full the reading should be 30-50 ohms while an empty tank should have a 240-260 ohm resistance value and a half full tank will be approximately 125-165 ohms. If a very high resistance or infinity is indicated on the meter, the sender may be "open" or not grounded. Check that the sender and the fuel tank are both grounded by placing one probe of a Multi-Meter on the sender flange and the other probe on the engine crankcase. The meter then must indicate one ohm or less. Replace the sender if one ohm or less was present and if a higher resistance is present, check for a poor connection on the ground wire.

If when the gauge did not indicate FULL when the fuel gauge sender Y/W wire was grounded with the ignition switch at IGNITION check the voltage to the (O/W) (+) and (BK) (-) wires of the fuel gauge connector and a correct reading will be equivalent to battery voltage. If battery voltage is not present check for a broken or disconnected wire. Replace gauge if wiring problem is not foun

You may have a unique problem!!! Normally I would say it is the sending unit- in the fuel tank!!!! But Buick LeSabre had a weird thing happen from time to time. Look closely at your fuel guage and focus on the PIN that acts as a stop for the fuel guage to not go beyond the Full mark. Make sure the pin is on the correct side of the pin!!! Sometimes the needle will somehow jump the pin on "E" or "F", and literally hold the needle in place.

needs change the sensor in the fuel tank

You might have bent the gauge pin when changing the pump there is a lever that is easly bent you might need to take it back out of ther tank and fix..

The first thing you need to know is what the alternator output is when this starts happening.
It could be a faulty connection in the wiring harness, or a bad ground connection, or a failing alternator.

If you will contact me directly at [email protected] I'll send you a complete trouble shooting guide to a fuel gauge. It's for Dyna Wide Glide but it should be the same gauge just mounted a bit different. Don't forget to remind me of what you need.

Good Luck
steve

Sounds like you have a ground fault. I once had a car with a faulty ground wire on the headlight, when I put high beam on the speedo would jump to 170km/h and the indicators would glow dimly. Sure sounds like a similar ground fault to me, check all the ground straps, from the headlight or anywhere else you can think of.

Hi there. If the fuel gauge is the only one acting up, its probably a loose or corroded wire on top of the gas tank where the fuel pump sets in. It could also be a loose wire on the back of the gauge, which is easier to get to so you could always check that first by popping off the dash pannel and pulling out the instrument cluster and looking for a broke wire on the back of the fuel gauge. But if I had to bet I would guess its on the other end by the fuel pump. Worse case sinario, maybe a bad sending unit.