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  #1  
Old 02-15-2015, 01:49 PM
itsmyyname itsmyyname is offline
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Default No high idle when cold start

2002 Ranger 4.0 5spd in the mornings when its cold it doesn't idle high.. When it firsts starts it'll rev up to about 2000-2500 rpms then drop to about a 1000rpms..

Every over Ranger I have owned or driven idle kinda high when you first start it cold...

Doesn't really bother me but it would be nice if it did idle high in the mornings...
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Old 02-15-2015, 01:52 PM
djfllmn djfllmn is offline
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Default Re: No high idle when cold start

sounds normal to me...
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Old 02-15-2015, 02:13 PM
itsmyyname itsmyyname is offline
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Probably is but I just figured it would have a high idle or.maybe it just isn't cold enough
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Old 02-15-2015, 02:22 PM
ranger4.0 ranger4.0 is offline
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That's what mine does, granted its a 2.5 but that sounds right
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Old 02-16-2015, 11:06 AM
Xx-L1l-M3-xX Xx-L1l-M3-xX is offline
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Default Re: No high idle when cold start

2500 is a pretty high idle... That's what my sohc goes to when its cold then idles at 900-1000 till its nice and toasty
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Old 02-16-2015, 07:29 PM
gotmlk98 gotmlk98 is offline
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Default Re: No high idle when cold start

2500 is high for idle. My 2.3 idles around 1900 or 2000 when I first start in in the morning
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Old 02-17-2015, 11:45 AM
itsmyyname itsmyyname is offline
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Quote:
Originally Posted by gotmlk98 View Post
2500 is high for idle. My 2.3 idles around 1900 or 2000 when I first start in in the morning
Itll go up to 2500 when I first start it and drop right back down to around 1000
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Old 02-19-2015, 11:21 AM
Xx-L1l-M3-xX Xx-L1l-M3-xX is offline
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Default Re: No high idle when cold start

Tap the gas if it doesn't go into a high idle at first, that force it to go into the cold start idle
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Old 02-19-2015, 11:37 AM
cowboybilly9mile cowboybilly9mile is offline
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Default Re: No high idle when cold start

Quote:
Originally Posted by itsmyyname View Post
2002 Ranger 4.0 5spd in the mornings when its cold it doesn't idle high.. When it firsts starts it'll rev up to about 2000-2500 rpms then drop to about a 1000rpms..
That's how it's supposed to operate, it's set up like this for emissions reasons. The idea is for the engine management system to go into closed loop (ie, use O2 sensor data, more precise) as quickly as possible rather than rely on boilerplate open loop defaults (not as precise) for establishing the fuel/air mixture.

Quote:
Originally Posted by itsmyyname View Post
Every over Ranger I have owned or driven idle kinda high when you first start it cold...
Your current one is idling "kinda high" when you first start it. But and again, it's calibrated to not need to linger in high a high idle for prolonged amounts of time, as opposed to older vehicles with FI or worse yet, a carb. Also, you're in GA where it doesn't get very cold; if you were to go out and start your current Ranger at -10F it would probably idle "kinda high" for about 30 seconds, maybe a little bit more, then back off.

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Originally Posted by itsmyyname View Post
Doesn't really bother me but it would be nice if it did idle high in the mornings...
Why? There is no need for it. .gov likes clean air. This things happen when there are overpopulation issues. Also, thanks to more precise air/fuel ratio management, think about how longggggg your cats are going to last since they don't have to mop up as much hydrocarbons as the old vehicles used to dump in them.
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Last edited by cowboybilly9mile; 02-19-2015 at 11:53 AM.
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