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Your reply to my post is pure genius! I didn't understand the relationship between the glow plugs and the necessary heat to ignite diesel fuel. I was thinking of the glow plugs as "Spark Plugs" rather than a heat booster. You explained everything so well, I think I could now explain it to...

Thank you for answering my question about cylinder ignition. I didn't (don't?) quite understand the relationship between compression heat, glow plug ignition, etc. It seems to me that if all of the glow plugs are Full Mission Capable, the engine starts quickly. If some of the glow plugs have...

Another Odd-Ball question... If, say, four or five glow plugs are working, what happens in the cylinders with glow plugs that don't work? I guess that eventually, the mixture in these "failed plug" cylinders begins to ignite, but how? What happens if you only have two functional glow plugs...

Thank you both for your responses. I wasn't sure how glow plugs behave. Someone stated that "They either work or they don't". indicating that they work great all the time until they quit. Another person stated that "They start out good but progressively get worse and worse until they no...

I have never owned a diesel truck before and I have a few questions regarding the glow plugs that you folks might be able to answer. I am guessing that when the key is turned on and the WAIT light is active, the glow plugs are heating up, but do they ALL glow or is it possible that some work...