2006-12-28 20:38:12 · 13 answers · asked by kenny m 2 in Cars & Transportation ➔ Maintenance & Repairs
Generally yes, sometimes depends on the age of the car but most cars these days have an automatic cut off.
2006-12-28 20:46:44 · answer #1 · answered by Anonymous · 0⤊ 0⤋
Not exaclty. But by the time it stops your fuel gauge should read FULL.
The fuel pump nozzel detects the high concentraction of fumes or even fuel coming back up the filler neck of the car and shuts off. Should the handle not work and continue to pump and overfill your car, there should be in plain sight, a RED emergency shut off button. Normally posted on the End poles.
It is not recommend to continue to click the handle to fill the car to the very top.
1. Expansion during hot weather can cause the tank to rupture or as a minimum leak fuel out onto the ground and pose a major fire hazzard.
2. All unleaded fuel cars use a system to pressurize the tank to allow the vapors to be burned off in the engine instead of leaked off into the environment. A too full tank can cause this system to malfunction
3. Fuel injected cars send more fuel to the engine then is needed. The remaining fuel is then sent back to the tank. If the tank is too full this return port is unable to return the fuel.
4. Chances of splash back during filling. fuel on your clothes or skin causing skin irritation and the possibility of fire. Not to mention wasting this high priced commodity.
Also just for FYI:
-Using a cellphone during filling has been contributed to inducing a spark which causes the vapors to flash and cause nasty fires.
-Climbing in and out of a car while filling up, normally during the cold month, has been contributed to causing a fire by building static electricity on the drivers clothes. When the drivers grabbed the fuel nozzel a spark ingited the vapors and caused a very nasty fire.
-NEVER EVER fill a fuel can while it is in, or on, your vehicle. Fire hazzard
2006-12-28 20:52:14 · answer #2 · answered by shovelkicker 5 · 0⤊ 0⤋
In the UK yes they do. The pump senses the back-pressure from the rising fuel level in the tank neck. You can squeeze a bit more but don't try to do it beyond the second time it stops.
NB This may not work if you're filling something like a jerry can.
2006-12-28 20:55:23 · answer #3 · answered by champer 7 · 0⤊ 0⤋
A fuel pump only works when the ignition is turned on , injection fuel pumps only engages when the pressure dropes below a cetain pressure all switch of when ignition is switched of a full tank does not have any connecton with the fuel pump . If your refering to a petrol station filling handle when the petrol flow meets resistance the handle automaticly switches of
2006-12-28 23:10:59 · answer #4 · answered by ? 7 · 0⤊ 0⤋
Yes
2006-12-28 20:40:08 · answer #5 · answered by rusco21 3 · 0⤊ 0⤋
Yes it does but normally you can get a bit more fuel in if you wish to round it off to the nearest pound.
2006-12-28 20:41:07 · answer #6 · answered by sugarplum9903 4 · 0⤊ 0⤋
UK ?
if the nozzle is fully inserted in the filler neck the pump will automatically shut off when the tank is full.
2006-12-28 21:07:58 · answer #7 · answered by Daddybear 7 · 0⤊ 0⤋
on newer pumps, yes. the nozle senses back preasure. however if you are filling something like a gas can where the hole the nozzle is in is significantly bigger than the nozzle itself it will not sutomaticlay stop pumping when the container is full.
2006-12-28 20:42:04 · answer #8 · answered by Dashes 6 · 1⤊ 0⤋
Yes they do stop automatically, they all have safety valves fitted to stop the fuel shooting out of the filler tube.
2006-12-28 21:02:58 · answer #9 · answered by Simon H 4 · 0⤊ 0⤋
in the UK yes.... petrol pumps have to stop when the car is full...In the USA no you can spill gas all over the place ........as long as you pay for it.
2006-12-28 20:43:08 · answer #10 · answered by Anonymous · 0⤊ 0⤋