One comment on “Replacing Glow Plugs… Is there a coking issue?

  1. If one or more glow plugs have burned out, are heavily coated with carbon or are not receiving their usual dose of start-up voltage, the engine will become progressively harder to start as temperatures drop, and will idle roughly and produce white smoke in the exhaust for several minutes once it finally starts. If all the glow plugs are burned on the end, you’d better check the injection timing because it is probably over-advanced.

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