LB7 2003 smoke at idle - Diesel Bombers



Chevy/GMC Duramax 01-04 LB7 Discussion of Chevy and GMC Trucks with LB7 Duramax Turbo Diesel Engines

Reply
 
 
 
LinkBack Thread Tools Search this Thread
  #1  
Old 03-06-2011, 01:06 PM
Newbie
Thread Starter
 
Join Date: Mar 2011
Posts: 3
Default LB7 2003 smoke at idle

In the last couple of weeks I notice some blue smoke when I am idling. It only happens when idling and engine is warmed up. I have 80,000 miles on truck and this is the first time I am having trouble with it. I changed oil and filter and also fuel filter. I keep on looking at the oil level for possible fuel leak into sump. No change. However, it might be too early to tell because I only have 70 miles on it since the last oil change. I use the right specifications and viscosity for the oil. The air filter is an after market K&N filter. No trouble codes are displayed and it gives me a "no codes" on my OBD II scanner.
Please, give me your thoughts. Would it be advisable to drive home, about 2000 miles, or should I have it repaired asap. Also if only one injector leaks should I just replace this one and don't worry about the rest.
Thanks. Hoiman
Reply With Quote
  #2  
Old 03-07-2011, 01:17 AM
BriteWhiteRam's Avatar
Diesel Bomber
 
Join Date: Mar 2009
Location: Alberta, Canada
Posts: 1,070
Default

Have your injector balance rates checked.....
Reply With Quote
  #3  
Old 03-07-2011, 09:21 AM
Newbie
Thread Starter
 
Join Date: Mar 2011
Posts: 3
Default

Planning to have it scanned today to see what the injectors are doing. I am evaluating to see if I can drive it home to British Columbia where I have the tools and garage to work on it.
Thanks, BriteWhiteRam for your input.
Hoiman
Reply With Quote
  #4  
Old 03-07-2011, 12:58 PM
BriteWhiteRam's Avatar
Diesel Bomber
 
Join Date: Mar 2009
Location: Alberta, Canada
Posts: 1,070
Default

It shouldn't hurt it too badly, but just be nice to it, check the oil periodically to make sure you're not getting oil delusion, You can probably just replace the one or more that are bad, replacing all 8 would hurt
Reply With Quote
  #5  
Old 03-11-2011, 11:12 AM
cfarley0210's Avatar
Diesel Enthusiast
 
Join Date: Jan 2010
Location: oregon
Posts: 287
Default

i would repace all them if your going to replace any it would suck to get it all together and start it and end up with a fuel knock due to new and old injectors mixed
Reply With Quote
  #6  
Old 03-11-2011, 04:50 PM
2500HeavyDuty's Avatar
Super Moderator
 
Join Date: Oct 2007
Location: Houston, Tx
Posts: 14,878
Default

replace all of them, i just recently did an injector job and replaced only one (was out of specs) and the truck still smokes at idle
Reply With Quote
  #7  
Old 03-11-2011, 05:15 PM
Diesel Bomber
 
Join Date: Sep 2009
Posts: 2,492
Default

i didnt want to hear that. i got one injector way out on balance rates and haze at idle. wasnt looking forward to putting that much into it just to sell it.
Reply With Quote
  #8  
Old 03-11-2011, 05:19 PM
2500HeavyDuty's Avatar
Super Moderator
 
Join Date: Oct 2007
Location: Houston, Tx
Posts: 14,878
Default

Quote:
Originally Posted by DieselCrawler View Post
i didnt want to hear that. i got one injector way out on balance rates and haze at idle. wasnt looking forward to putting that much into it just to sell it.

you can give it to me how it is, you dont have to sell it
Reply With Quote
  #9  
Old 03-11-2011, 06:37 PM
Diesel Bomber
 
Join Date: Sep 2009
Posts: 2,492
Default

nah, was hoping to get back what i paid for it, but doubt it now. only paid 10000 for it.
Reply With Quote
  #10  
Old 03-12-2011, 07:18 AM
BRE's Avatar
BRE BRE is offline
Diesel Wrench
 
Join Date: Feb 2010
Location: Southwest Missouri
Posts: 769
Default

I did one on a truck and like 3 months later we were back at it again... Twice the labor for one job. It hurts but i would just do all of them.
Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
2003 GMC Duramax LB7 Bamafantrey Chevy/GMC Duramax 01-04 LB7 4 08-24-2015 10:30 AM
Smoke at idle got worse Jmrobinson 5.9 Liter CR Dodge Cummins 03-07 11 08-21-2015 10:54 PM
2003 lb7 shut off at drive thru cdhearn Chevy/GMC Duramax 01-04 LB7 4 06-17-2015 12:15 PM
04.5 5.9 CUMMINS LIGHT BLACK SMOKE AT IDLE ryank 199 Diesel In Distress - Support Ticket 1 05-14-2015 07:41 PM
Lb7 wont idle DanielC559 Chevy/GMC Duramax 01-04 LB7 8 11-21-2014 07:59 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On



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