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Afterglow system, part of the glowplug setup. Intermittently fires off the glowplugs (for short bursts) to get full combustion happening sooner. Mine always seemed a little random as to when it actually chose to "afterglow", but I always figured "betsy knows best"?

Anyway, as long as its during the warmup period, its completely normal.


After driving mine for a while I realized the "afterglow" system only tends to work when you throttle up the engine. If you just leave it idle it won't happen, but if you rev it up the glow plugs will start firing. Once I figured this out it was much much easier to get betsy running during the cold snap back in February.

Maurie