Are Glow Plugs On All The Time?

Are Glow Plugs On All The Time?? Do glow plugs work when engine is running? The glow plugs remain switched on during the post-heating time even if the engine is running. The length of the post-heating time is determined by the type of engine and the engine temperature. Only special “post-heating” glow plugs are used … Continue reading Are Glow Plugs On All The Time?