high idle...possible problem?

J

j-rod

Up to no good
Joined
Jun 29, 2008
Messages
3,628
Hey guys,

I started my truck today after a pretty cold night - about 8*F outside. It was around 14*F when I fired it up. It started like usual except for the longer grid heater duration. I was walking back up to my apt and I heard the high idle (with 3 cyl cutout) starting to "kick in" as expected. I waited and listened for it to get up to around 1200 RPM and it started to do some spitting and sputtering. It has gone into the 1200 RPM idle before, and it did not have this kind of reaction. I took a short video - picture quality is not the best, but the sound does a good job at representing what happened. Is this normal with it being so cold? I didn't have the block heater plugged in, and the fuel was treated. Any ideas?

I took a video the second time it did it:

http://www.youtube.com/watch?v=I4N_hQpt5Bg
 
my guess is the heater grid cycled off is when the truck starts to sound sick toward the end of the video. its not gonna wanna run good with 10 degree air being put into the cylinders its almost like the air is so cold it wants to put the fire out.
 
Sounds to me like it hit high idle, then went into 3cyl high idle, sounds just like mine does.... Didn't hear anything abnormal....
 
Thanks for the input guys. I was under the misconception that 1200 RPM high idle meant it was running with the 3 cyl cutout, but that was not the case.

I hear ya Michael...hasn't been this cold in State College in a while either. Makes me wonder why it never cut out 3 cylinders last winter. Weird.
 
Yeah. Like I posted up above - its just weird that it all of a sudden is doing it this year when it was just as friggin cold last winter. Just caught me by surprise.
 
thanks for the vid, I was wondering what it sounded like. mine went to high idle today for the first time. I started it, went back in the house, then heard the pipes a few minutes later. kinda surprised me also, I looked out side to make sure there wasn't someone in it. :hehe:
 
do all year 24v trucks do it, most of the videos were 01's. mine wont bump to 1200 much less drop 3. i think the scheid pump has something to do with that.?.?.
 
Have you flashed with a smarty? It "unlocks" the feature... should work on all 24valves...
 
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