Destroyed/lacking probe tip
- Cause
- Ignition unit failure.
- Incorrect/irregular fuel jet direction.
- Incorrect number or size of sealing causing incorrect spraying position.
- Remedy
- Check the correspondence of ignition unit with the car type and proper installation of the ignition unit.
- Check glow plug installation hole for carbon fouling.
- Replace your plugs.
Dimples on the probe tip
- Cause
- Ignition unit failure.
- Incorrect/irregular fuel jet direction.
- Incorrect number or size of sealing causing incorrect spraying position.
- Remedy
- Check the correspondence of ignition unit with the car type and proper installation of the ignition unit.
- Check glow plug installation hole for carbon fouling.
- Replace your plugs.
Probe deformation
- Cause
- Ignition unit failure.
- Incorrect/irregular fuel jet direction.
- Incorrect number or size of sealing causing incorrect spraying position.
- Glowing time too long or excessive voltage (12-V glow plug used in the 24-V system or vice versa).
- Alternator & regulator failure.
- Injection unit operation/timing failure.
- Remedy
- Check the correspondence of the ignition unit with the car type and proper installation of the ignition unit.
- Check glow plug installation hole for carbon fouling. Check glow plug regulator (contacts).
- Check on-board voltage and glow plug voltage.
- Check charging system voltage.
- Check fuel injection timing.
- Replace your plugs.
Lacking probe
- Cause
- Ignition unit failure.
- Incorrect/irregular fuel jet direction.
- Incorrect number or size of sealing causing incorrect spraying position.
- Injection unit operation/timing failure.
- Damaged glow plug installation hole thread in the cylinder head/not tightened glow plug causing incorrect plug seating.
- Remedy
- Check the correspondence of the ignition unit with the car type and proper installation of the ignition unit.
- Check the glow plug installation hole thread in the cylinder head for damage/carbon fouling.
- Check ignition pump timing.
- Replace your plugs.
Probe perforation, fissures or melting close to the glow plug body
- Cause
- Ignition unit failure.
- Incorrect/irregular fuel jet direction.
- Incorrect number or size of sealing causing incorrect spraying position.
- Injection unit operation/timing failure.
- Damaged glow plug installation hole thread in the cylinder head/not tightened glow plug causing incorrect plug seating.
- Remedy
- Check the correspondence of the ignition unit with the car type and proper installation of the ignition unit.
- Check the glow plug installation hole thread in the cylinder head for damage/carbon fouling.
- Check ignition pump timing.
- Replace your plugs.
Carbon fouling between the plug body and the probe glow
- Cause
- Ignition unit failure.
- Incorrect/irregular fuel jet direction.
- Incorrect number or size of sealing causing incorrect spraying position.
- Ignition pump operation/timing failure.
- Remedy
- Check the correspondence of the ignition unit with the car type and proper installation of the ignition unit.
- Check the glow plug installation hole thread in the cylinder head for carbon fouling.
- Check ignition pump and its timing.
- Replace your plugs.
Other damage
- Cause
- Ignition unit failure, incorrect/irregular fuel jet direction.
- Incorrect number or size of sealing causing incorrect spraying position.
- Glowing time too long.
- Ignition pump operation/timing failure.
- Remedy
- Check the correspondence of the ignition unit with the car type and proper installation of the ignition unit.
- Check the glow plug installation hole thread in the cylinder head for carbon fouling.
- Check glow plug regulator (contacts).
- Check the ignition pump and its timing.
- Replace your plugs.