Audi Workshop Manuals > A4 Mk1 > Power unit > #Diesel direct injection and glow #plug system (4-cyl.)>06.97 > Fuel preparation system Diesel injection > Testing fuel injection control > Testing start of injection valve
Volkswagen Workshop Manuals > Golf Mk4 > Power unit > Direct injection and preglow system with distributor-type pump to 04.99 > Fuel preparation system Diesel injection > Repairing diesel direct injection system > Repairing injection pump