Several people are on the right track and are PARTIALLY correct. The gas gauge works off of a voltage, provided from the battery, through a regulator located behind the instrument cluster and a ground provided by the variable resistor attached to the float in the gas tank. The gauge needs a steady voltage therefore the regulator. A bad connection at the battery, as one stated, could cause the problem. Also a bad regulator although both would USUALLY (not always) show up as erratic operation in ALL the gauges. A bad connection at the tank or a bad sending unit could also cause and would be the first I'd check. Locate the wire from the sending unit. Remove it from the tank connection and, temporarily, tie it to ground. With the wire grounded, and the key turned to ON, the gauge should have a solid full scale reading. If it still fluctuates the problem is: The gauge, The gauge regulator or the battery connections. Clean the battery connections and if that doesn't cure it then replace the regulator and/or gauge. If the reading is solid try finding a variable resistor at an electronics parts store. They're very cheap. Wire it between the sensor wire and ground and adjust the resistor for various readings on the gauge. If all of them are steady readings, try cleaning the tank connection and rephooking the sensor wire. If the gauge readings are once again erratic the sending unit in the tank needs to be replaced.
2007-08-18 07:37:09
·
answer #1
·
answered by mustanger 7
·
0⤊
0⤋
Inside the gas tank theres like a balloon like in the toilet that goes up and down that might be broken. Its going to be costtly since they have to go inside the tank and repair it. I had the same problem with my 1990 Ford Crown Vic.
2007-08-18 18:06:04
·
answer #2
·
answered by Ray 2
·
0⤊
0⤋
Wonderbo placed it maximum suitable. The sending unit that's fixed interior the tank is undesirable. I as quickly as had that problem, and it became brought about by skill of a foul batch of Shell gas, however the employer confessed to their mistake and replaced my total gas pump assembly which risk-free the sending unit freed from charge.
2016-11-12 20:25:07
·
answer #3
·
answered by ? 4
·
0⤊
0⤋
Your tank float is a variable resistor or rheostat .To determine if it is bad you have to do a resistance check and see if resistance is jumping up and down. Your gauge may be at fault to cause it recieves a recieves a regulated voltage. Rule out float and then it`s a gauge
2007-08-18 07:14:55
·
answer #4
·
answered by miiiikeee 5
·
0⤊
0⤋
Bad sensor in the tank. You'll just have to keep track of how many miles you have on a tank of gas till you fix it.
2007-08-18 07:12:35
·
answer #5
·
answered by Nomadd 7
·
0⤊
0⤋
I have a chevy camaro - we had the same problem, it was so bad that we had to end up reseting the odometer every-time we refilled the gas and just remembered to refill at 200 miles.
it might just be a broken odometer.
2007-08-18 07:04:19
·
answer #6
·
answered by angiej00000 1
·
0⤊
0⤋
Gauge could be bad or the float in the tank is bad--a pro needs to solve that issue
2007-08-18 12:39:04
·
answer #7
·
answered by fire_inur_eyes 7
·
0⤊
0⤋
Replace fuel gauge sending unit (or fuel gauge sender).Mounted on fuel pump,inside gas tank.
2007-08-18 07:14:39
·
answer #8
·
answered by CarmaNguyen 7
·
1⤊
0⤋
I have a 94 chev truck and when the battery cables have a bad connection at the battery it sends all of my gages haywire. try cleaning the battery connections and see if that fixes it.
2007-08-18 07:08:38
·
answer #9
·
answered by frfiter 3
·
0⤊
0⤋
Sounds like your sender unit is failing.
2007-08-18 10:51:34
·
answer #10
·
answered by Chris F 3
·
0⤊
0⤋