Jump to content

Limited Power When Stuck

brishan02

Recommended Posts

brishan02 New Member

brishan02

Posted
Posted

I own a 2008 2500HD.So the other day I had parked on the side of the road in a grassy and very soft area. I was towing a small landscape trailer with a small 1 ton roller on it and also had a small load in the back of the bed (also a dump insert). So I go to pull out and see that I am getting stuck so I switch into 4 wheel drive and to my suprise I was only able to acheive at max 2000rpms. My tires were spinning and digging myself deeper, but I had no power above that range. :lol: This also happened about 3 weeks ago when I had to pull somone out of the mud when they were offroadding. Completely empty truck....and no trailer of course! I had absolutly no power.

Is there some sort of rev limiter that i am unaware about? I also own a 2003 2500hd and this is never an issue. It's almost like there is some sort of traction control taking over but I have no switch to turn it off! Please let me know if there is something that can be done or if its just my truck thats screwed up! :eek:

jf781 Enthusiast

jf781

Posted
Posted

Is there the trac control icon flashing on the dash when this was going on?

 

Does the same thing happen in 4lo. I know at least on my 09 when in 4lo that traction control and stabbilitrak are turned off.

 

BTW - hope you got out ok!!

RJG183SA Enthusiast

RJG183SA

Posted
Posted

I'm thinkin torque management kickin in. I had a situation with my previous '03 (pre-tune). Could not move after parking on a slab of ice, engine would only rev up to around 2k with 4x4 engaged. I tried rocking (going from drive to reverse rapidly) the nannies would not allow it to shift while the revs were up. The worst part of all was, I had to have a co-worker with a Dodge pull me off the ice patch :eek:

 

After the tune was installed (eliminating most of the TM) I could rev to redline while spinning the wheels :lol:

  • 2 weeks later...
brishan02 New Member

brishan02

Posted
  • Author
Posted
I'm thinkin torque management kickin in. I had a situation with my previous '03 (pre-tune). Could not move after parking on a slab of ice, engine would only rev up to around 2k with 4x4 engaged. I tried rocking (going from drive to reverse rapidly) the nannies would not allow it to shift while the revs were up. The worst part of all was, I had to have a co-worker with a Dodge pull me off the ice patch :lol:

 

After the tune was installed (eliminating most of the TM) I could rev to redline while spinning the wheels :(

 

 

So Im no mechanic or anything but what do you mean after the "tune" was installed? What exactly is done? I plow with this truck and it seems silly not to have full power at all times while plowing !

Archived

This topic is now archived and is closed to further replies.

Go to topic listing

  • Recently Browsing   0 members

    • No registered users viewing this page.

  • Forum Statistics

    250.4k
    Total Topics
    2.7m
    Total Posts

  • Member Statistics

    342,840
    Total Members
    8,960
    Most Online
    appletrav
    Newest Member
    appletrav
    Joined

  • Who's Online   1 Member, 1 Anonymous, 467 Guests (See full list)

  • Latest Articles

  • Posts

    • newdude
      2 speed transfer case optional now?

      By newdude · Posted

      This is a 1/2 ton thing ONLY.  All HDs 2020-2026 have the two speed transfer case, with Autotrac as an option.     1/2 tons 2019-2026, regular 4x4s come with a single speed case (no 4LO!), and trucks with Z71 ordered, or all Trail Boss trucks come with the 2 speed case.  2 speed case is also an option on WT, and is also standard on High Country.  
    • newdude
      Different requirements for oil filters?

      By newdude · Posted

      2013 5.3 still to this day calls for the PF48 filter.  Which as a 15psi bypass pressure.     There is a TSB, 17-NA-157 that talks about the PF-63 and PF-64 filters which have a higher bypass rating of 22psi.    TSB HERE - temp.xml   "Beginning in 2012, the oil pumps began to regulate main gallery feedback instead of pump out pressure. This means that the oil pump now does not begin to regulate until pressure is built up to the main gallery. This change reduces the amount of time it takes to provide oil to the engine bearing and lifters during extreme cold start conditions.  Main gallery feedback oil pump control systems are present on the following engine families which use Spin-on oil filters: Small Gas Engine (SGE), Large Gas Engine (LGE), High Feature (HFV6) Gen2 and Small Block Gen5 gasoline engines. These engines with the main gallery feedback oil pump control systems are factory built with an ACDelco® oil filters"   It also calls out what engines use those filters.  The gen 4 small blocks were not on that list (LMG, LC9, L9H, L92, L94, L20, L96).  Gen 5 small blocks use the higher pressure filter.          That all said...   Your 7045 Napa filter is the PF63 equivalent, with 22psi bypass.  You are already using the higher bypass pressure filter.  You CAN keep using it, you don't technically have to use it though.  
    • Grumpy Bear
      Different requirements for oil filters?

      By Grumpy Bear · Posted

      Do you know WHY the filter relief setting was increased to 22 psig?    When the new system goes into the second stage the pump volume ramps up considerably. It was found that the 15 psi filter bypass setting put the filter in bypass on a warm engine when the second stage was activated. Raising the filter bypass setting forced the filter to do what it designed to do. Filter. Preventing debris from circulating during high load, high rpm operation.    So next question is how did GM find this out? VLOM/lifter failures and a deep dive by Melling Corp.    Last question. Is it required? Look at it like this; a motor may be equipped with a rev limiter. But it only works if the set point in reached. That 22 psig setting only matters if the pressure differential across the filter media exceeds 15 psig during normal warm operation. Second stage kicks in around 3000-3500 rpm.    I can't answer your question because I don't know you and how you use the truck. But I think there is enough information here to let you decide for yourself. 😉
    • Coastie05
      give me some tips to make my truck look better

      By Coastie05 · Posted

      Go back to OEM wheels. 
    • newdude
      2020 Trailboss 6.2 replacement

      By newdude · Posted

      Probably not their first rodeo, so it should go as planned most likely.  Typically the service manager or tech doing the swap will put some seat time to shake it down after they get it all put back together.  We usually put 50-100mi before we hand them back so if something happens, its not after you get it.  A coolant leaks, oil leaks, a ground left off or loose, vibration, etc.     The new engines so far have been good?  There's been a couple that have popped out there again (the replacement engine) but most have been okay.  

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...