Why Does Engine Speed Fluctuate?
01-31-2007, 06:05 AM
#1
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Why Does Engine Speed Fluctuate?
When the engine is cold, and truck is coasting with clutch in or in neutral, the engine speed fluctuates between 700 to 1000 rpm. As soon as I come to a stop, the idle locks in at 700 rpm. Everything seems normal, just curious.
01-31-2007, 07:13 AM
#2
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Mine does it also. My guess it's something to do with programming of the speed sensor vs. engine rpms.
I usually wait until the rpms is down to less than 1k before engaging the clutch.
MikeyB
I usually wait until the rpms is down to less than 1k before engaging the clutch.
MikeyB
01-31-2007, 09:00 AM
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the engine is fueling to try and determine if the trans is in gear or not.. my 03 1500 gasser did it, my 04 2500 diesel does it too.. normal.. i never see mine though as i am in gear until about 1000rpm in 3rd [i downshift always coming to a stop]
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