No longer high Idle when cold?
Thread Starter
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Mountain Pass
Joined: Aug 2006
Posts: 122
Likes: 2
From: Berea, OH
No longer high Idle when cold?
I've got a 2000 f-350 SD with 264k and have had vertually no problems with this truck. Just this week I noticed it is no longer running at high idle when the engine is cold. I can hear the EBPV is closed in the exhaust while the engine is at idle, but no longer an increase in RPM's. Any ideas on what I need to check or replace?
Post Fiend
Joined: Nov 2007
Posts: 9,549
Likes: 14
From: Payson, AZ
My experience with High Idle and No High Idle boiled down to ambient air temp. Just a couple degrees colder and I would get high idle. And of course the inverse was true, a couple degrees warmer and no high idle. When I do get high idle it takes a minute or two after start up to kick in. A tap on the brake or go pedal and it would drop to normal idle than in a minute or two go back to high idle. Just my .02
Last edited by PaysonPSD; Feb 2, 2008 at 02:45 PM.
Not a liberal...
Joined: Jul 2006
Posts: 6,635
Likes: 4
From: Cut & Shoot, Texas
It has to be REALLY cold for the high idle to kick in on my truck. Most of the time (Southeast Texas) all I get is the whoosh from the EBPV. My high idle kicked in once this week and there was ice on the windows. The other days I got the EBPV but no high idle and there was no ice on the windows.
Elder User
Joined: Jul 2006
Posts: 530
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From: Vancouver, Washington
I agree with the temperature ideas people have said. I remember looking in my manual and I believe it was 38 or 41 degrees that the truck will partially close the EBPV and increase throttle, if the temperature sensor recognizes a warmer temp, it won't idle up. It's all built in. Have the temps been around 40 degrees or at least warmer where you are lately?
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Elder User
Joined: Jul 2006
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From: Vancouver, Washington
Originally Posted by PaysonPSD
My experience with High Idle and No High Idle boiled down to ambient air temp. Just a couple degrees colder and I would get high idle. And of course the inverse was true, a couple degrees warmer and no high idle. When I do get high idle it takes a minute or two after start up to kick in. A tap on the brake or go pedal and it would drop to normal idle than in a minute or two go back to high idle. Just my .02
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Freshman User
Joined: Dec 2007
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Ya my truck seems to do the same thing, it takes a couple of minutes for the high idle to kick in and then if you tap the pedal it will come down. Seems to kick in just around the freezing mark. If its much above say 35 degrees, then i dont think it comes on.
Elder User
Joined: Jul 2006
Posts: 530
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From: Vancouver, Washington
Originally Posted by PaysonPSD
Brian,
That is probably why my truck will not high idle until 1 or 2 minutes after start up. Its waiting for the glow plugs to turn off.
That is probably why my truck will not high idle until 1 or 2 minutes after start up. Its waiting for the glow plugs to turn off.
Page 12
4. When the engine starts, release the key. The glowplugs will continue to be actiovated for up to two minutes. If the engine is not started before the activation ceases, the glow plug system must be reset by turning the ignition key to OFF
Page 13
COLD WEATHER OPERATION
In cold weather below 0* C (32*F) your diesel engine will slowly increase to a higher idle speed if left idling in (P) Park. The sound of the engine may change also, as an exhaust device engages to improve heater performance and reduce exhaust smoke.
Hope that helps!
Thread Starter
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Mountain Pass
Joined: Aug 2006
Posts: 122
Likes: 2
From: Berea, OH
OK, the temps have been in the low teens to single digits this past week and I have not plugged the truck in since I have been working out of town and at a hotel. It has always kicked up the Idle before anytime it was below about 35deg. after about two minutes of running time. I'm assuming sometype of sensor may have failed. Everything else appears top be working normally, glowplugs, startup etc.
