* Loose or disconnected gas cap. If the gas cap is not properly tightened, it can allow air to enter the fuel system and cause a vapor lock. This can prevent the engine from getting the fuel it needs to start.
* Clogged fuel filter. A clogged fuel filter can restrict the flow of fuel to the engine. This can cause the engine to stall or run rough, and it can also prevent the engine from starting.
* Faulty fuel pump. A faulty fuel pump can be unable to deliver enough fuel to the engine. This can cause the engine to stall or run rough, and it can also prevent the engine from starting.
* Bad spark plugs or ignition coils. Bad spark plugs or ignition coils can prevent the engine from getting the spark it needs to start. This can cause the engine to crank but not start, or it can cause the engine to misfire and run rough.
* Low battery. A low battery can prevent the engine from getting the power it needs to start. This can cause the engine to crank slowly or not at all.
If your car is not starting after refueling, it is important to identify the cause of the problem so that it can be repaired.