Sensor Plate Free Play
- Free play is measured between control piston and adjusting lever. To ensure Differential Pressure Regulator (DPR) current is 4-16 mA, position of sensor plate lever must be correct. Measure free play on side of sensor cone closest to fuel distributor. See Fig 1
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Courtesy of VOLKSWAGEN UNITED STATES, INC.
- Crank starter motor for 10 seconds to develop fuel pressure. Lift sensor plate slightly until resistance is felt. Minimum clearance is any noticeable free play. Maximum clearance is .078" (1.99 mm) up to sensor cone.
- If free play clearance is incorrect, remove fuel distributor. Check basic adjustment of sensor plate lever. Install fuel distributor and repeat free play clearance check. If still incorrect, adjust sensor plate clearance with control piston stop screw.