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What would cause an engine to stall?

An engine stalls when it cannot produce enough power to overcome the resistance to its motion. This can be caused by a number of factors, including:

* Fuel starvation: This can occur if the fuel tank is empty, the fuel line is blocked, or the fuel pump is not working properly.

* Air starvation: This can occur if the air filter is clogged, the throttle body is blocked, or the intake manifold is leaking.

* Spark plug failure: This can occur if the spark plugs are worn out, fouled, or not properly connected.

* Ignition system failure: This can occur if the ignition coil, distributor, or other ignition components are not working properly.

* Engine mechanical failure: This can occur if there is a problem with the pistons, rings, valves, or other engine components.

When an engine stalls, it will typically stop running immediately. In some cases, it may sputter or hesitate before it stalls. If your engine stalls, you should try to identify the cause of the problem and fix it before attempting to restart the engine.