Fuel gauge problem 00 W900L

Mine is single gauge and it does the opposite, with no rime or reason it will drop to empty for a couple miles and then return to the proper reading. May do it once a day or once a month. How are you ever going to trace that down.

 

I have never driven a truck that had a gauge that read properly. My current truck will read 5/8th tank right after I just filled up.

 

You can short the fuel tank sensor wire to ground and it should read full. Just take the wire off the top of the tank and touch it to the ground wire. My guess is that a wire it shorting out by touching something. The sensor in a fuel tank is just a big variable resistor. The higher the fuel level is the lower resistance.

I just have one fuel gauge. I spent at least 1/2 a day calibrating it. You need to find a level ground and idle your truck for about 1/2 an hour so that both tanks are the same. You can use any stick to measure how much fuel is in the tank. Take the float out of the tank and bend it one way or the other depending which way your gauge is off.

Also, you can't just set the float back in without screwing it down to check. Screwing it down will show more fuel in the tank then there is. So, each time you bend the rod you need to screw it back down and check to see if your gauge is correct.

You also need to make note where the fuel gauge rod is and when you pump fuel and you need to stay clear of it. You can point that rod anywhere you want, doesn't matter.

Another fact. Driving down the highway your fuel gauge will show less fuel then you have if the sensor is on the drivers side. The highway is not flat and in the right lane you will be tilted to the right. This will cause more fuel to go into the right tank and give you a false reading.

This next part is for you geeks!!!

A fighter jet must know how much fuel is in the tanks and it must be accurate without bouncing around even when they are upside down or going straight up. How do they do it???? This can be done on a truck also. The fuel tanks are made just like a capacitor. A capacitor has oil in it and no matter what position you can measure the capacitance. Pretty cool huh.

 

Get someone to sit in the truck and start wiggling wires.

 

try to take out ur lever in tank clean it