F 350 2WD Pickup V8-7.3L DSL Turbo VIN K (1994)
Glow Plug: Testing and Inspection
The following examples of glow plug failures give different clues to cause of failure:
Glow Plug
There is no visible damage, but glow plug is electrically open. This indicates an internal heating element failure.
Glow Plug
Glow plug tip that is missing can be caused by incorrect timing or poor fuel quality.
Glow Plug
Multiple, distorted glow plugs are usually caused by electrical overheating. A complete inspection of the glow plug control system should be
made.