How do you remove a fuel injector from a 1992 Volvo 240?

To remove a fuel injector from a 1992 Volvo 240, first, disconnect the negative battery cable to ensure safety. Then, relieve the fuel system pressure by removing the fuel pump fuse and starting the engine until it stalls. Next, detach the fuel rail by unbolting it and carefully lifting it off the injectors. Finally, pull the injector out of its socket, being cautious not to damage the O-rings.