Opening Pressure Test
WARNING: This page is about a different car, the 1983 Volkswagen Vanagon, 1983 Volkswagen Rabbit, 1983 Volkswagen Quantum, 1983 Volkswagen Pickup, and 1983 Volkswagen Jetta. However, it is still accessible from the selected car via links, so may be relevant.
With testing gauge (US 1111) still connected to injector, move pump lever down slowly. Note pressure at which injection nozzle releases fuel. Nozzle working pressure must be within specifications. Adjust, if necessary, by changing shims. Thicker shims increase pressure, thinner shims decrease pressure.
INJECTOR NOZZLE OPENING PRESSURE
| Model | psi (kg/cm2 ) |
|---|---|
| Turbo Diesel | 2248-2364 (158-166) |
| All Others | 1740-1885 (122-132.5) |
NOTE:
A shim thickness increase of .0019" (0.05 mm) increases pressure by 71 psi (5.0 kg/cm2
). Shims are available in thicknesses of .039-.070" (1.00-1.95 mm) in .0019" (0.05 mm) increments.