038130073BN — Symptoms & Failure Modes
Common symptoms and verified failure modes of a failing Bosch 038130073BN (0414720313) VW 1.9 TDI PD Pumpe-Duse Unit Injector.
Top-end ticking / tapping noise · high
Worn PD camshaft injector lobes and/or rocker contacts change the injector actuation and produce a tapping noise.
Rough idle and misfire · high
A worn or leaking unit injector under/over-fuels its cylinder.
Loss of power · medium
Reduced or mistimed injection from a worn injector or worn cam lobe.
White or black smoke · medium
Poor atomisation or incorrect injection timing.
Hard starting and uneven running · medium
A failing unit injector affects start fuelling on its cylinder.
Oil dilution / contamination · medium
Injector seal leakage and PD cam wear debris can contaminate the oil.