Chevy/GMC Duramax 06-07 LBZ Discussion of Chevy and GMC Trucks with LBZ Duramax Turbo Diesel Engines

06, low power then takes off like you flipped switch

Thread Tools
 
Search this Thread
 
  #1  
Old 10-17-2012, 09:35 PM
Wyo's Avatar
Wyo
Wyo is offline
Newbie
Thread Starter
Join Date: Oct 2012
Posts: 3
Received 0 Likes on 0 Posts
Default 06, low power then takes off like you flipped switch

truck is running around 12lbs of boost then all the sudden (around 45mph usually) it takes of hard. (some times takes longer than 45 and sometime slower, but 45mph is pretty close to usual)
If your over 60mph it runs fine but drop down to 30-45 and it takes forever to get it to really go again.
No smoke that I can see, maybe a faint amount.

Fuel psi comes up to 16-19,000psi and when it lets loose it and the boost jump instantly to 25lbs and 25,500psi

So everything is working and I figured one without the other would cause smoke but I'm at a loss, injectors balance out within 1.5 + or -. From what I can see its hitting desired fp. I haven't looked at the vvt %'s yet.

Anyone ever heard of such a thing.


egr hooked up or deleted, same thing
lift pump hooked up or not, same thing but pulls higher speeds a little quicker.
 
  #2  
Old 10-22-2012, 08:21 PM
Wyo's Avatar
Wyo
Wyo is offline
Newbie
Thread Starter
Join Date: Oct 2012
Posts: 3
Received 0 Likes on 0 Posts
Default

Found a finger stick, took it out and it hauls azz, don't know why but something is messed up.
 
  #3  
Old 10-25-2012, 02:50 AM
2004LB7's Avatar
Diesel Bomber
Join Date: Dec 2010
Location: Fool's Golden State
Posts: 1,190
Likes: 0
Received 113 Likes on 109 Posts
Default

ECM probably thought the EGR was open. it uses a different, lower, fuel map with it open. any codes from this?
 
  #4  
Old 10-25-2012, 09:33 PM
Wyo's Avatar
Wyo
Wyo is offline
Newbie
Thread Starter
Join Date: Oct 2012
Posts: 3
Received 0 Likes on 0 Posts
Default

Cel is on but haven't checked.
I am waiting for the efi live I just got to get here, any suggestion how to use the thing, I'm prob going to need a little help or at least it would be nice to know rather than guess.
 
  #5  
Old 10-26-2012, 11:00 AM
2004LB7's Avatar
Diesel Bomber
Join Date: Dec 2010
Location: Fool's Golden State
Posts: 1,190
Likes: 0
Received 113 Likes on 109 Posts
The following users liked this post:
Wyo (10-26-2012)
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
fivepointohno
5.9L CR Performance
12
01-25-2016 01:07 PM
robbyS
5.9 Liter CR Dodge Cummins 03-07
3
04-16-2015 02:22 PM
Josh Chretien
5.9L 12V Performance
5
03-01-2015 06:00 AM



Quick Reply: 06, low power then takes off like you flipped switch



All times are GMT -5. The time now is 10:07 PM.