Quote:
Originally Posted by GMCNUT
I do not know what the official name of this is, always heard it called cadillacing. Never heard anyone say it was caused by engine deposits that's for sure....hmmmm
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The names I have heard most frequently for this behavior are "running-on" or "after-run". There really is no spark once you turn off the switch and the fuel-air mixture has to be ignited by something. Well that something is a hot spot in the combustion chamber, and most often that hot spot is a deposit that has been heated to the fuel ignition temperature.
Don't forget to try reducing the idle speed. This can often be enough to fix the problem.
Ray