Fuel guage needle going up and down

manikjeet · 12th March 2007, 17:55

The fuel guage of my Alto lx has been playing some tricks lately.While i am driving or take a turn or a car goes over a bump the needle suddenly dip down and then slowly goes up again to the same level.
Once the needle was below the reserve and filled her with 500rs petrol and the needle went way up more than half the tank it happened only once.with 10l of petrol how can it show half a tank

i think the needle has become over sensitive.Is their anything that can be done because its becoming very irritating now.
Have searched and couldn't get a answer

low_bass_makker · 12th March 2007, 18:05

the fuel gauge works on the variable resistance in the fuel tank....the higher the fuel level the resistance is less so the gauge show full level...the variable resistance in the fuel tank is faulty....that is why it is showing incorrect readings......

planet_rocker · 12th March 2007, 18:10

ur fuel "tanky's" meter/leveler(gauge) is not working properly. we had the same problem in my dad's car.

solution: open the "tanky" and change / repair the meter/leveler(gauge) and any mech can do it. the petrol needs to drained out though. but u can always carry those big plastic jars and pour the petrol back when the leveler is repaired / changed.

harsh87 · 12th March 2007, 18:41

you can also try getting the tanky cleaned while you get the meter repaired.

Jaggu · 14th March 2007, 14:53

check the wiring for fuel guage also, especially the grounding

manikjeet · 14th March 2007, 15:02

Got it checked tanky cleaned the mechanic said it was the first time he had open a tanky of a alto
got the fuel pump checked now only dash instrument panel is left now i think the problem is with the panel

theMAG · 14th March 2007, 15:06

The sensor is faulty or the worm is weak.

manikjeet · 14th March 2007, 15:09

Quote:

Originally Posted by theMAG

The sensor is faulty or the worm is weak.

How much is the sensor for and what is a worm

theMAG · 14th March 2007, 15:37

Dont know abt sensor cost. A worm is a high-tensile spring that controls the movement of the needle in an analog meter. If the worm is weak, the needle roams - as might have been observed in old cars/vans/buses.

12th March 2007, 17:55	#1
manikjeet Senior - BHPian Join Date: Sep 2006 Location: chandigarh Posts: 1,617 Thanked: 296 Times View My Garage	Fuel guage needle going up and down The fuel guage of my Alto lx has been playing some tricks lately.While i am driving or take a turn or a car goes over a bump the needle suddenly dip down and then slowly goes up again to the same level. Once the needle was below the reserve and filled her with 500rs petrol and the needle went way up more than half the tank it happened only once.with 10l of petrol how can it show half a tank i think the needle has become over sensitive.Is their anything that can be done because its becoming very irritating now. Have searched and couldn't get a answer
	() Thanks

12th March 2007, 18:05	#2
low_bass_makker Senior - BHPian Join Date: Mar 2006 Location: Faridabad Posts: 6,813 Thanked: 306 Times View My Garage	the fuel gauge works on the variable resistance in the fuel tank....the higher the fuel level the resistance is less so the gauge show full level...the variable resistance in the fuel tank is faulty....that is why it is showing incorrect readings......
	() Thanks

12th March 2007, 18:10	#3
planet_rocker Senior - BHPian Join Date: Sep 2006 Location: Bong-land Posts: 2,323 Thanked: 426 Times	ur fuel "tanky's" meter/leveler(gauge) is not working properly. we had the same problem in my dad's car. solution: open the "tanky" and change / repair the meter/leveler(gauge) and any mech can do it. the petrol needs to drained out though. but u can always carry those big plastic jars and pour the petrol back when the leveler is repaired / changed. Last edited by planet_rocker : 12th March 2007 at 18:12.
	() Thanks

12th March 2007, 18:41	#4
harsh87 BHPian Join Date: Aug 2006 Location: Delhi Posts: 169 Thanked: 3 Times View My Garage	you can also try getting the tanky cleaned while you get the meter repaired.
	() Thanks

14th March 2007, 14:53	#5
Jaggu Team-BHP Support Join Date: May 2004 Location: Bangalore Posts: 20,379 Thanked: 17,321 Times	check the wiring for fuel guage also, especially the grounding
	() Thanks

14th March 2007, 15:02	#6
manikjeet Senior - BHPian Join Date: Sep 2006 Location: chandigarh Posts: 1,617 Thanked: 296 Times View My Garage	Got it checked tanky cleaned the mechanic said it was the first time he had open a tanky of a alto got the fuel pump checked now only dash instrument panel is left now i think the problem is with the panel
	() Thanks

14th March 2007, 15:06	#7
theMAG Distinguished - BHPian Join Date: May 2006 Location: Avon, CT Posts: 7,196 Thanked: 1,823 Times View My Garage	The sensor is faulty or the worm is weak.
	() Thanks

14th March 2007, 15:37	#9
theMAG Distinguished - BHPian Join Date: May 2006 Location: Avon, CT Posts: 7,196 Thanked: 1,823 Times View My Garage	Dont know abt sensor cost. A worm is a high-tensile spring that controls the movement of the needle in an analog meter. If the worm is weak, the needle roams - as might have been observed in old cars/vans/buses.
	() Thanks