You say "Well for once no one said check ignition timeing!" You say that because with the ignition off, timing cant have anything to do with dieseling right ? I always thought the same thing until about a year ago. With no spark, how can timing have anything at all to do with an engine's tendency to diesel ???
Well i found out last year that ignition timing can have everything to do with an engines tendency to diesel at shutdown.
I have a heavy tandem truck with a GMC 478 V6 engine. As long as I have owned this truck, it ran hot, was underpowered and dieseled terribly at warm shutdown. Last year I discovered the timing marks on this engine had slipped position(damper outer ring had slipped) and actually were running the timing very late, very retarded. I repaired the timing marks and correctly timed the engine. It now ran much cooler and had much more power. Another thing really shocked me, this old engine no longer dieseled at a warm shutdown ????? Why ??? The late ignition timing was making the exhaust valves run very hot, hot enough to light off the fuel and keep the engine rattling along on a few cylinders.
So I learned that late ignition timing can have a dramatic effect on an engines tendency to diesel at shutdown. Your never too old to learn new things ;-) Im 64. ;-)
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Today's Featured Article - Harvestin Corn in Southern Wisconsin: The Early Years - by Pat Browning. In this area of Wisconsin, most crops are raised to support livestock production or dairy herds in various forms. Corn products were harvested for grain, and for ensilage (we always just called it 'silage'). Silo Filling Time On dairy farms back in the 30's and into the first half of the 40's, making of corn silage was done with horses pulling a corn binder producing tied bundles of fresh, sweet-smelling corn plants, nice green leaves with ear; the
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