How do you replace the fuel pressure regulator on a 1990 Ford Tempo?

To replace the fuel pressure regulator on a 1990 Ford Tempo, first, relieve the fuel system pressure by removing the fuel pump fuse and running the engine until it stalls. Disconnect the negative battery cable, then remove the fuel lines and electrical connector from the regulator. Unbolt the regulator from the fuel rail, replace it with the new one, and reassemble the fuel lines and electrical connections. Finally, reconnect the battery, reinstall the fuse, and start the engine to check for leaks.