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Old 11-02-2013, 05:13 PM
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Question Is it normal for the idle to rise?

it happens everytime I start it up in the morning, itll be in the low 700's RPM and then it raises quite fast within about a minute up to 830-850 RPMs is that normal or is there something I should be worried about?
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Old 11-03-2013, 06:53 AM
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No it is normal, when it is below a certain temp the PCM will raise the engine idle to bring the temps up to a norm.
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Old 11-03-2013, 09:53 AM
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phew!!! you put my mind at ease lol, thank you so much!!!!
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Old 11-04-2013, 11:49 AM
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not a problem at all!
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Old 11-07-2013, 07:33 PM
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I believe its programming in the PCM they call the "cold weather idle strategy". If the ambient temperature is below something like 48F & the engine idles for more than 130 seconds the cold weather idle strategy is initiated & will increase the rpm's to between 800 & 1200 rpm depending on how far below activation temp the ambient temperature is.Touching the brake pedal momentarily will reset the base idle time. The strategy will remain active until the engine coolant temperature reaches 158F. I may not have the numbers right but that's how it was explained to me.
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Old 11-08-2013, 03:46 PM
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numbers sound very close to me from what i have read in the past
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Old 11-23-2013, 07:12 PM
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GET A 73 *****ES
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Old 11-24-2013, 06:03 AM
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I have a 6.4 and 2 "73"s and they do the same thing Sean it's not a bad thing it's just warming the engine
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Old 12-11-2013, 08:15 AM
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Quote:
Originally Posted by western762 View Post
it happens everytime I start it up in the morning, itll be in the low 700's RPM and then it raises quite fast within about a minute up to 830-850 RPMs is that normal or is there something I should be worried about?
I take it you live in a warm climate? lol

Its completely normal, makes the truck actually warm up when its -40 degrees F over night.
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