Replacing the fuel pressure regulator on a Toyota Previa 1993?

To replace the fuel pressure regulator on a 1993 Toyota Previa, first, relieve the fuel pressure by removing the fuel pump fuse and starting the engine until it stalls. Disconnect the battery, then locate the fuel pressure regulator on the fuel rail, usually secured with bolts and having fuel lines attached. Remove the fuel lines carefully, then unbolt the regulator and replace it with the new unit, ensuring all connections are secure. Reconnect the battery, replace the fuse, and start the engine to check for leaks and proper operation.