Now I have to try it.
Has Anyone Noticed this?
Thread Starter
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Elder User
Joined: Jul 2003
Posts: 551
Likes: 1
From: SW Montana
Has Anyone Noticed this?
Went hunting this past weekend, driving in about 6" of heavy wet snow. Stopped to talk to some other hunters for about 10 minutes. When I went to leave, truck would not move. Floored truck, waited a few seconds, turned to my hunting partner and said "I have this thing floored, it won't move." he looked at me like I was crazy, responded after verifying I wasn't lying, and by then, the truck was starting to move slowly forward. Truck was in 4wd Low Range at the time.
This has happened before, when I stopped in 2wd hi range, in front of my house. Truck won't move until it gets into the approx. 1400 rpm range. It takes literaly 10 seconds for it to get to that point.
Any thoughts?
This has happened before, when I stopped in 2wd hi range, in front of my house. Truck won't move until it gets into the approx. 1400 rpm range. It takes literaly 10 seconds for it to get to that point.
Any thoughts?
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Elder User
Joined: Jul 2003
Posts: 551
Likes: 1
From: SW Montana
I don't think this is a 4wd Lo Range problem. This has happened to me several times before, this is just the first time I was in 4Lo. Last spring we got a heavy snow dump, pulled up to the house, went inside for about an hour, came back out started truck and truck did the same thing. Parked in the meadow one day, same thing! I have found it very common with my truck. Any resistance whatsoever, truck will not move. I know the snow storm last spring, my wife pulled up next to me in here car and parked. We went inside to eat lunch, and then we both went out at the same time to leave, she jumped in her car and drove away, while I am sitting in front of the house holding the pedal to the floor on this big powerful 4x4 truck and I cant move.
Junior User
Joined: May 2006
Posts: 67
Likes: 0
From: Durango, CO
This is fairly common on my '06, I've nicknamed it "dead pedal" it happens mostly when the truck "thinks" it's too cold. Lows are in the 20s lately and unless I let the truck idle for a minute when I first start it the darn thing refuses to move. It also seems to be worse if I have to back out. Once it warms up it never (knock on wood) does it.
I strongly suspect it's the computer trying to protect the engine by limiting power delivery on what it feels is a too cold engine.
It did something very similar months ago after a long tow and the next day in the late morning. I took it into the local dealer and they kept it for 3 days then gave it back with a new EBP seosor which they said was out of range. The symptomes weren't exactly the same that time as the cooling fan also kicked on no matter that it just started and was cool.
Bottom line is these trucks are too "smart" yet the tech' hasn't been refined enough to make them smart enough.
I strongly suspect it's the computer trying to protect the engine by limiting power delivery on what it feels is a too cold engine.
It did something very similar months ago after a long tow and the next day in the late morning. I took it into the local dealer and they kept it for 3 days then gave it back with a new EBP seosor which they said was out of range. The symptomes weren't exactly the same that time as the cooling fan also kicked on no matter that it just started and was cool.
Bottom line is these trucks are too "smart" yet the tech' hasn't been refined enough to make them smart enough.
Last edited by daveshan; Oct 25, 2006 at 08:53 AM.
Cargo Master
Joined: May 2006
Posts: 2,116
Likes: 6
From: Florida
i agree that my truck dosen't like being cold, and i can tell a difference between a hot and cold engine, as the transmission holds the gears longer when cold. also it seems a little more sluggish when first started, but when you guys say it is floored what rpm's are we talking and when you say it "won't move" do you mean literally? or figuratively
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Junior User
Joined: May 2006
Posts: 67
Likes: 0
From: Durango, CO
Flooring it gives little or no increase in rpm when in gear, truck will move slowly if on totally flat land, if you're in gravel or have any kind of obstruction such as mud, incline etc forget it, you're not going anywhere.
Haven't tried taking it out of gear when this is happening to see if it will rev'.
Haven't tried taking it out of gear when this is happening to see if it will rev'.
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Senior User
Joined: Feb 2005
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Had this happen for almost a year before my former dealer was able to find 4 bad injectors that they couldn't find the first time I brought it in for this symptom. Although it only happened when cold, until the temp gauge started moving. After that it was great for about 2 months, then started doing it again, but not as bad. They replaced the turbo before it blew through the hood, bu other than that all the injectors 'are within spec'.
Postmaster
Joined: Dec 2003
Posts: 4,196
Likes: 10
From: Arizona
jfralph,
Could very well be an injector issue as "Mark Oomkes" has said. Take it to your dealer and let them check it out. They need to keep it overnight so that they can perform a cold start check on the injectors.
Hope this helps
Could very well be an injector issue as "Mark Oomkes" has said. Take it to your dealer and let them check it out. They need to keep it overnight so that they can perform a cold start check on the injectors.
Hope this helps
Senior User
Joined: Apr 2004
Posts: 220
Likes: 4
From: Great Falls MT.
Yea I noticed that before on my 2005 CC LB PSD pulling a 26' enclosed snowmobile trailer. I got stuck in about foot of snow last year pushed on the pedal and nothing. I think it has to do with the resistance being stuck not allowing movement to allow the turbo to spool up smoothly. I have have driven it a year now and not one problem with it after that, I would bet that if I get in deep snow again it would do it again.
warm weather. 
Got Diesel?
Joined: Jan 2004
Posts: 4,345
Likes: 21
The only thing close to this that happened to me is the following:
1) Cold/cool morning started truck.
2) Tried to drive away after only 1 minute - but truck was sluggish (tranny).
3) Upon letting warm up - all was fine (5 minutes).
4) Tried pulling a boat trailer on a cold morning and truck had no "go-go" as tranny had not built up pressure???
I have found that on cold mornings (on up-hills or pulling) the tranny wants to be warmed up for a few minutes. I suspect that the deep snow, cold fluid and the like that this is what happened. I have found that before I hook up to my buddy's boat that I drive arond the block first and let it idle while I hook up to it.
Double check all your flusids to make sure all is well. When was last time fluids and filter were changed? Do not think it is a 4WD issue as the back wheels would still try and work.
Good luck.
1) Cold/cool morning started truck.
2) Tried to drive away after only 1 minute - but truck was sluggish (tranny).
3) Upon letting warm up - all was fine (5 minutes).
4) Tried pulling a boat trailer on a cold morning and truck had no "go-go" as tranny had not built up pressure???
I have found that on cold mornings (on up-hills or pulling) the tranny wants to be warmed up for a few minutes. I suspect that the deep snow, cold fluid and the like that this is what happened. I have found that before I hook up to my buddy's boat that I drive arond the block first and let it idle while I hook up to it.
Double check all your flusids to make sure all is well. When was last time fluids and filter were changed? Do not think it is a 4WD issue as the back wheels would still try and work.
Good luck.
Senior User
Joined: Feb 2005
Posts: 347
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Beachbum, I thought it might have been that as well. So I dropped it in nuetral and tried revving it up, still wouldn't go like it should have. My problems were definitely the injectors as before they went bad, it would move fine in the dead of winter with no warm-up and after the injectors it would move again with no warm-up. And, my other 2 6.0's rev\gain RPM's just fine and will move when cold, so that is how I ruled out the tranny.
Now maybe there is some software glitch that is showing up randomly causing the tranny to not build pressure or allow the engine to be fully fueled when cold. It isn't like there haven't been several dozen software changes made.
Just like the mystery donwshifts that quite a few owners have experienced that magically went away.
Now maybe there is some software glitch that is showing up randomly causing the tranny to not build pressure or allow the engine to be fully fueled when cold. It isn't like there haven't been several dozen software changes made.
Just like the mystery donwshifts that quite a few owners have experienced that magically went away.
Got Diesel?
Joined: Jan 2004
Posts: 4,345
Likes: 21
Originally Posted by Mark Oomkes
Beachbum, I thought it might have been that as well. So I dropped it in nuetral and tried revving it up, still wouldn't go like it should have. My problems were definitely the injectors as before they went bad, it would move fine in the dead of winter with no warm-up and after the injectors it would move again with no warm-up. And, my other 2 6.0's rev\gain RPM's just fine and will move when cold, so that is how I ruled out the tranny.
Now maybe there is some software glitch that is showing up randomly causing the tranny to not build pressure or allow the engine to be fully fueled when cold. It isn't like there haven't been several dozen software changes made.
Just like the mystery donwshifts that quite a few owners have experienced that magically went away.
Now maybe there is some software glitch that is showing up randomly causing the tranny to not build pressure or allow the engine to be fully fueled when cold. It isn't like there haven't been several dozen software changes made.
Just like the mystery donwshifts that quite a few owners have experienced that magically went away.
Wonder if the oil is too thick and not flowing well, if this motor disengages or limits the amount of "HP/Boost" as not to overload the injectors??? Just trying to think outside the box for you on this one? Could the EGR valve be stuck open and/or the turbo vanes sticking and not building boost???