The adjustment screw on the Manifold Pressure Sensor (MPS) came from the factory with a plastic protective cap, intended to stay on for the life of the device. However it is common to find the cap missing due to a mechanic in the past trying to “fix” problems by adjusting the MPS.
A replacement cap can be 3D printed (once your MPS has been re-calibrated).
Download the STL file here. Peel off the small, circular “brims” after printing.
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