Opening Pressure

Blow out any dirt around injection nozzles, then remove fuel lines and nozzles. Mark nozzles for correct installation.
Install nozzle on pressure tester. Bleed air out, then pump as hard as possible several times to clean out nozzle. Pump up pressure slowly and note when nozzle opens.
Opening pressure should be 2062-2389 psi (145-168 kg/cm² ) for new nozzles.
If pressure is not within these specifications, disassemble and clean nozzle. Change shims as necessary to obtain proper opening pressures.
NOTE: Shims are available in 20 thicknesses in increments of .002" (.05 mm). Thickness of shims vary from .039" (1.00 mm) to .076" (1.95 mm). One size change will adjust pressure 91 psi (6.4 kg/cm² ).
Test nozzle again to ensure opening pressure is correct, then check for leakage.