Glow plugBrussels
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214. Glow plug
A glow plug is an electrical heating element used in diesel engines to help ignite the fuel during cold starting. It heats the combustion chamber so that the compressed air reaches conditions suitable for reliable combustion.
Modern glow plugs can continue operating briefly after the engine starts to improve combustion, reduce cold-start emissions and help the engine run smoothly while warming up.
Wikimedia.org • Chris828 • CC0
Can a faulty glow plug affect diesel emissions?
Yes. Poor glow plug operation can make cold combustion less effective and can contribute to increased emissions or rough running while the engine is cold.
🔗 denso-am.eu • DENSO, glow-plug operation and fault diagnosis
Should a faulty glow plug be replaced?
Yes. A defective glow plug should be diagnosed and repaired according to the vehicle manufacturer's requirements, particularly when it causes difficult starting, warning messages or poor cold-engine operation.
🔗 denso-am.eu • DENSO, glow-plug operation and fault diagnosis

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