what triggers the low-fuel light?

[dark_knight]

the fuel needle being low or a fuel pressure sensor of some sort..?
this is because you will notice at times that the light will come on and off depending on your driving surface; on when hill-climbing and off when downhill or on level road. i'd presume this is because the level-sensor/sender-unit in the tank only takes readings from one side of the tank so when the vehicles pitch and yaw changes then the readings also change..

 

[bucketep91]

a float in the tank, as you go up and down hills the fuel will move around and the float will move with it making your light come on

 

[dark_knight]

so are you saying that there is a separate float for the fuel light and one for the fuel gauge (needle)..?

 

[chrisinflight]

Hi, There is only one float attached to the fuel pump unit (stock). When the float hits a certain lower point it triggers an electric connection to the light. All other times it` measuring the fuel level. Maybe check out a pic of a fuel pump on parts database or ebay to get more of an idea.
cheers,
chris

 

[stuarty1]

its on a float and a sensor wen the flat goes down then the sensor picks it up and gives u a reading of topic but alot of the times they get stuck on cars when you let them run low and fill up and it sticks lying under the car and hitting it a good thump fixes it

 

[hardcoreep]

http://hardcore.ep91.com/engine_fuelpump2.html

Float arm attached to an electric level.

 

[dark_knight]

so we can happily conclude that the fuel light is triggered when the level gets to a 'new low'

 

[Sheldon]

why the light fades somtimes? for example im almost on the low side and boosting the light fades slowly

 

[stuarty1]

wat u mean wen it goes of and on ? ^^^^^

 

[gtturboireland]

sometimes i sit in my gt and the needle be at the empty mark and light on, and i drive a bit down the road and i look at petrol and its at 1/4 tank?

 

[-BenGTTurbo-]

So lets say my Fuel light has stopped working after i ran the car really low. How would i go about fixing this ??

 

[stuarty1]

easyst way dont let it run low but if it does happen could b a sencor or just the float stuck just punch the shit out of it or use some object dont b to gental lol

 

[Paul_JJ]

why the light fades somtimes? for example im almost on the low side and boosting the light fades slowly

It's only on 98 models mate - didn't see it on my 96 model! I know what you mean though -)

 

[dark_knight]

which still maintains the question lads; if it's a sensor or a pressure switch. i think most schools of thought point towards the light just being wired to the fuel level sensor and has nothing to do with pressure in any way. i guess it also depends on what year your chariot is..

 

[Sheldon]

It's only on 98 models mate - didn't see it on my 96 model! I know what you mean though -)

mine is 96

 

[Paul_JJ]

mine is 96

OK - big lol.

 

[dark_knight]

closed

i think i got what i need from this. thanks all..
closing thread..