More often these days we are seeing a warning message, that draws attention to a glow device error. The reason I suppose is that their main function is to improve combustion during the warm up phase & therefore reduce emissions.
I do find it interesting that enough heat can be harnessed by compressing an intake charge at a temperature around zero degrees centigrade, to produce the heat required to ignite the injected diesel. It takes some comprehending doesn't it!
Regards
Dave
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