Caution! The turbo boost pressure regulator rod must not be adjusted.
Remove the turbocharger.
Caution! The test cannot be performed with the turbocharger installed.
Fig. 2.208. Checking the fuel pressure regulator
Use a magnetic stand with an indicator, the leg of which is installed on the end of the actuator rod of the boost pressure regulator valve (as coaxially as possible with the rod) (fig. 2.208).
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Gradually apply pressure to the pneumatic actuator of the pressure regulator using a vacuum pump.
At a pressure of 331 Mbar, the piston rod stroke is 1 mm.
At a pressure of 544 Mbar, the piston stroke is 5 mm.