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Will a diesel van start if the glow plug relay has gone or plugs arent working?

A diesel van may not start if the glow plug relay has failed or the glow plugs are not working. Glow plugs are heating elements that are used to preheat the combustion chambers of diesel engines before starting. This helps to improve cold-starting and reduce engine wear. If the glow plug relay is not working, the glow plugs will not receive power and the engine will be more difficult to start, especially in cold weather. Similarly, if the glow plugs themselves are faulty, they will not be able to heat the combustion chambers and the engine will be difficult to start. In addition, a faulty glow plug relay or glow plugs can cause other problems such as engine misfires, rough idling, and reduced fuel efficiency. If you suspect that your glow plug relay or glow plugs may be faulty, it is important to have them inspected and repaired as soon as possible to avoid further damage to your vehicle.