Volkswagen diesel engines made since 1991 use Turbocharged Direct Injection, or TDI. The 1.9-liter version of this engine appears in various Volkswagen models made since 1995, including the Golf, Jetta, Passat and New Beetle. TDI engines have a turbocharger and inject fuel directly into the cylinder. This is a mechanical method of fuel injection, which does not use an electronic controller to determine when the injector sends fuel to the cylinder.
Tools Used, Tools, Socket wrench set, Shop cloth, Heat shields for fuel injectors
Change the Injectors
Remove the fuel pump fuse from the fuse box under the dashboard. Start the engine, and allow it to idle until it stalls. This will relieve the pressure in the fuel system. Turn the engine off, and replace the fuel pump fuse in the fuse box.