Testing a VP44 injection pump requires a Bosch EPS815 calibration test stand with the proper adapters. In this video, we show the steps for calibrating the VP44 injection pump, calibration or programming the PSG (black box on top of pump), and installing the correct timing key.
Some items to note:
A new PSG is blank from the factory and must have the proper calibration "burned" into it on the test stand, based on the injection pump part number.
The proper timing key is installed after the calibration procedure, with the arrow on the key pointing toward the injection pump. The key is offset to adjust for slight variations in tolerance for base timing.
The loop on the housing, on the mounting surface, is used to verify timing, don't pry on it during pump removal.

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