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It is possible for there to be a reaction which could cause an explosion, although this is an exceptionally rare occurrence. Most vehicles have devices to keep this from happening, however, why would you want to chance it?

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Q: Why switch off a car engine when filling it with fuel?
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What is the fuel pump shut off switch?

A fuel pump switch is just a switch to shut of an electrical fuel pump or a electrically controlled fuel pump.There are several control systems for this switch:Most modern cars have an impact triggered fuel pump cut off switch. This is so the car won't burst into flames after a crash.Many cars have an oil pressure triggered switch so if the engine runs out of oil the engine stops.Virtually all modern car have a system where the engine computer runs a fuel pump relay.


Can a fuel pump cause your car to not start?

yes, no fuel pumping to the engine your car will not crank, be sure it is the fuel pump and not the oil pressure switch or any other problem.


Where is the fuel switch on 2000 buick lesabre custom?

fuel pump relay for you car, is located in the engine compartment fue box


What will car do if the fuel shut off switch is turned off in a 95 Mercury Wagon?

Fuel pump will not run and engine will not start.


Where is theTemperature fan Switch for a 1986 Chevrolet celebrity?

If your car has the "X" engine with carburetter the fan switch is in the intake manifold more or less in front of the distributor. If your car has the "W" engine with fuel injection the fan switch is in the top of the thermostat outlet.


How does a fuel relay affect a car?

Assuming you mean fuel PUMP relay, it is the remote switch that turns the fuel pump on and off. If it fails, your engine will not run.


What does fuel shut switch do?

The fuel shut off switch turns off the flow of fuel to the engine in case of an accident. This prevents a puddle of gas forming under the car, which in the case of a front end accident, can be REALLY bad.


Why can a barrel of oil be used only once as a fuel?

Um....you're car engine burns fuel so you can only burn it once. That's why you have to keep filling it over and over again.


Where is the kill switch on a 1995 Grand Marquis?

There is no "kill" switch on a 1995 Grand Marquis. There is a fuel inertia buttom that when activated stops the fuel from reaching the engine so the car will not go even thought it does have power.


Where is the emergency fuel shut off switch in a 1995 Nissan Maxima SE?

There is not an actual 'switch'. The fuel pump is controlled by the PCM (engine computer) and will shut it off if the engine stops running. Assuming the car is in a serious wreck and the engine is damaged and stalls, the fuel pump will shut off after a few seconds. Ford and old Jags are the only vehicles I know of with an actual 'impact' switch. Scott West


Is it normal for the fuel gage to stay on when the engine is switch off?

It is normal for many vehicles for the fuel gauge to stay on when the engine is switched off. This helps a driver to know how much gas they have remaining without turning the car on.


Can a fuel pump relay cause a car to stall after starting?

A fuel pump relay switch can cause your car to stall after starting. A malfunctioning fuel pump relay switch can cause your car to not start at all.