Why do injectors fail??? - Diesel Place : Chevrolet and GMC Diesel Truck Forums
 
Home Forum Market Place Garage Lounge (0) Tuning Library DTC Tool Register Vendors
Go Back   Diesel Place : Chevrolet and GMC Diesel Truck Forums > GM Diesel Engines > Duramax First Generation: 2001-2004 (LB7)
Register FAQ Forum Rules My Replies My Threads Mark Forums Read Auto EscrowAuto LoansInsurance

DieselPlace.com is the premier Duramax Diesel Forum on the internet. Registered Users do not see the above ads.
Closed Thread
 
LinkBack Thread Tools
Old 06-06-2010, 02:12 PM   #1 (permalink)
Craigy
Diesel Head
 
Join Date: Apr 2009
Location: Bandera
Posts: 42
iTrader Score: 0 reviews

Why do injectors fail???

Just had injectors replaced at dealer. I have owned this truck for about a year and a half, and have put about 20k miles on it. While at the dealer, the manager told me this was the third set of injectors to be replaced on my truck! First set at 50k, second at 101k and now again at 140K.(they replaced them under the warranty-7 yrs or 200k so it did not cost me anything) What can I do to keep this from happening again? Anything??? I like the truck, and right now I cannot afford to replace it, so I am looking make it last at least another 50K.
The manager did not answer my question as to whether the ones being put in are the same ones as the original. Was the original injector design changed, or did they just decide to extend the warranty knowing a lot of them would fail? Do they fail due to dirty oil and/or fuel, if so what is the best alternative??
__________________
2004 Crewcab, 4WD, Gutted cat with muffler, 6 inch Ranch lift, PPE set on level 2. 285/65/17 BF all terrains.
Offline  
Quick reply to this message
Sponsored Links
Advertisement
 
Old 06-06-2010, 05:11 PM   #2 (permalink)
RonJT
Diesel Master
 
Join Date: Nov 2003
Location: Redondo Beach California
Posts: 1,038
iTrader Score: 0 reviews

i'd say it is probably NOT the injectors that is the problem in YOUR truck.
__________________
RJTirado
Offline   Quick reply to this message
Old 06-06-2010, 07:10 PM   #3 (permalink)
Craigy
Diesel Head
 
Join Date: Apr 2009
Location: Bandera
Posts: 42
iTrader Score: 0 reviews

What makes you say that? What do YOU think the problem is in MY truck??
__________________
2004 Crewcab, 4WD, Gutted cat with muffler, 6 inch Ranch lift, PPE set on level 2. 285/65/17 BF all terrains.
Offline   Quick reply to this message
Old 06-06-2010, 07:35 PM   #4 (permalink)
shookme
Diesel Specialist
 
Join Date: Dec 2009
Location: Michigan
Posts: 839
iTrader Score: 0 reviews

Here you go; couple hours of reading :

Injector Failure Ideas
Offline   Quick reply to this message
Old 06-06-2010, 07:43 PM   #5 (permalink)
TheBac
Diesel Laureate
 
TheBac's Avatar
 
Join Date: Nov 2003
Location: Mid-Michigan
Posts: 12,215
iTrader Score: 3 reviews

Ive come to the conclusion that LB7 injectors fail simply because they hate us.
__________________
Tom

"BBT" 2003 GMC 2500HD CC/SB 4x4
12.14 @ 111.15


2003 Olds Aurora 4.0 -- the "new" car

Success is getting what you want. Happiness is wanting what you get.

Reality is a matter of perspective.

I know just enough to be dangerous.
Offline   Quick reply to this message
Old 06-06-2010, 07:49 PM   #6 (permalink)
Brad92
Diesel Master
 
Brad92's Avatar
 
Join Date: Oct 2008
Location: College Station, Texas
Posts: 4,577
iTrader Score: 0 reviews
Send a message via Yahoo to Brad92

Lone Star Diesels Member

Quote:
Originally Posted by TheBac View Post
Ive come to the conclusion that LB7 injectors fail simply because they hate us.
That makes more sense than anything else I have heard.

My truck must not hate me. Yalls trucks are just haters.
__________________
2001.5 QCLB 24v Cummins NV5600 4x4
Reg Cab Member #105
Young and Poor Club Member #18
Offline   Quick reply to this message
Old 06-06-2010, 08:57 PM   #7 (permalink)
Craigy
Diesel Head
 
Join Date: Apr 2009
Location: Bandera
Posts: 42
iTrader Score: 0 reviews

OK..........I did read a lot of the posts......seems to me-everyone has ideas ( some really good ones)why the injectors fail, but I did not seem to find the definitive answer I was looking for. Hey, Im far from being a genius and do not have any better answers, so I will just drive it and hope for the best.
__________________
2004 Crewcab, 4WD, Gutted cat with muffler, 6 inch Ranch lift, PPE set on level 2. 285/65/17 BF all terrains.
Offline   Quick reply to this message
Old 06-06-2010, 09:06 PM   #8 (permalink)
02 2500hd
Diesel Technician
 
02 2500hd's Avatar
 
Join Date: Aug 2008
Location: Pitcher, NY
Posts: 391
iTrader Score: 0 reviews
Send a message via AIM to 02 2500hd

Quote:
Originally Posted by Craigy View Post
OK..........I did read a lot of the posts......seems to me-everyone has ideas ( some really good ones)why the injectors fail, but I did not seem to find the definitive answer I was looking for. Hey, Im far from being a genius and do not have any better answers, so I will just drive it and hope for the best.
Welcome to OUR world
__________________
06 LBZ CCSB Banks Cold air, Banks Cat Back, EGR Delete with "mild" tune. Cat to go next.

Sold it
02 2500HD basically stock, 450k miles now. 5 sets of injectors, valves adjusted, 3rd altinator, 2nd injector pump, 2nd injector modual, 3rd PRNDLL switch, new harmonic ballancer pin, and other work on the moter and trany to keep it going. 3rd transfer case, 2nd frontend. travels down the road at 9300# every day then it gets loaded.






Load it like a Box car, drive it like a Stock car.
Offline   Quick reply to this message
Old 06-06-2010, 09:23 PM   #9 (permalink)
TheBac
Diesel Laureate
 
TheBac's Avatar
 
Join Date: Nov 2003
Location: Mid-Michigan
Posts: 12,215
iTrader Score: 3 reviews

Quote:
Originally Posted by 02 2500hd View Post
Welcome to OUR world
Yup. "Why ask why?" We dont really know.

But I stand behind the premise that the injectors just hate us, though.
__________________
Tom

"BBT" 2003 GMC 2500HD CC/SB 4x4
12.14 @ 111.15


2003 Olds Aurora 4.0 -- the "new" car

Success is getting what you want. Happiness is wanting what you get.

Reality is a matter of perspective.

I know just enough to be dangerous.

Last edited by TheBac; 06-06-2010 at 09:24 PM.
Offline   Quick reply to this message
Old 06-06-2010, 10:01 PM   #10 (permalink)
Mike S
Diesel Fanatic
 
Join Date: Mar 2010
Location: Cameron Park Ca.
Posts: 75
iTrader Score: 0 reviews

Why???

The injectors fail because the design is faulty.

The fact that GM is no longer using the same kind of injectors is proof enough as far as I am concerned. If the injectors were OK, then there would be no reason to spend the $$ for R/D of a better design.

Also, if the design was not faulty, they why did they replace them all in 05 or so, and then yet again offer the 7/200,000 joke of a warranty??

My suspicion is that the high fuel pressure is a big part of the cause. Add in any form of particulate contaminate, and it makes a pretty effective cutting tool to wear out the guts of the injectors.
Offline   Quick reply to this message
Sponsored Links
Advertisement
 
Closed Thread

Thread Tools

Posting Rules
You may post new threads
You may 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 On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
What actually happens when the injectors fail??? dmaxorpantax Duramax First Generation: 2001-2004 (LB7) 2 08-10-2008 10:08 AM
Just my luck the Injectors will fail after the 7yr replacement Blitz636 Duramax First Generation: 2001-2004 (LB7) 20 02-25-2008 12:15 PM
Why do the LB7 injectors fail ? bfastcars Duramax First Generation: 2001-2004 (LB7) 2 12-22-2007 11:39 PM
need all eight injectors to fail for warranty? trevor von rothkirch Duramax First Generation: 2001-2004 (LB7) 18 01-30-2007 01:33 AM
How do you know when injectors fail? Chvymtl3 Duramax First Generation: 2001-2004 (LB7) 10 09-03-2006 09:15 AM


All times are GMT -4. The time now is 07:50 AM.


Shoutbox provided by vBShout v6.2.1 (Lite) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd. Runs best on HiVelocity Hosting.
© AutoGuide

SEO by vBSEO 3.6.0