problem, this is due to the fact that most older cars have a fuel line which easily gets disconnected. when it’s disconnected just check if the fuel is able to come out. when no fuel gets out, your fuel filter most likely is filled with dirt and no fuel can pass the filter. this often occurs when the fuel filter is not replaced in time. when you drive up to the moment your tank is almost empty, all dirt from the bottom of your tank will get collected in your filter. when your filter is clogged, just replace the fuel filter, this is often the solution. when your filter needs 