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I undetstand why some LB7s are having to have the injectors replaced. But as I look at all the posts about injectors I see that allot of trucks have had multiple sets replaced. Why do the replacement sets go bad? I would have assumed that the new ones would be an upgraded version so that the situation would not repeat itself.

Steven
 

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The replacement injectors are actually rebuilt.
 

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How much will new injectors run you?
 

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LB7Fassler;1561355; said:
How much will new injectors run you?
$0-$100 if under warranty, depending on your year and mileage, $4,000-5,000 out of warranty.
 

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Also could be where they fuel up, dust, or malfunction of other parts of the fuel system/electronics that affect the injectors.
 

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Pretty frightening to think that your truck will go out of warranty and you'll pay 4 to 5 grand to have injectors replaced - then turn around and do it again 10,000 miles or so later. :eek:
 

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This is quoted from PAOUTDOORSMAN, John, I think the injector problem is a blown out of proportion a bit on a site like this because you only hear from those who have problems.

Yes bosch had some materials issues in the early injectors which seemed to exxagerate the problem. But the bottom line problem really comes down to fuel cleanliness. This can be evidenced by the injector failures experienced by guys that have the updated injectors installed in the early Duramaxes, and the newer Duramaxes that were produced with the updated injectors. Some fuel sources are just much cleaner than others.

The best thing you can do as soon as you have your new injectors installed is to add additional filtration such as the Nicktane filter kit found at nicktane.com
 

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Even people with added filtration have had injector issues, so that is not the end all solution either. Not to say that it doesn't help, just not THE answer. I have been a lucky one, still on my first set of injectors...and I am only using stock filtration. And on top of that my filter only gets changed every 12k or so.
 

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True, but the added filtration sure can't hurt. When I had my injectors replaced at 80,000, one of them was bad out of the box.
 

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Blown out of proportion -hardly!

Blown out of proportion - I doubt it! There are some posts where owners have had problems with starters, transmissions, head gaskets, transfer cases, etc. But reports of injector problems are rampant. These reports probably don't scratch the surface of the real problem. For every person that reports a problem here, there are numerous others that don't use the internet and have never heard of this site. People come to this site to share knowledge and learn more about their trucks. They tend to be honest and forthright about their experiences and I don't think they come to complain. If someone has a problem we here about it. If injectors weren't a major issue - there would be no discussion here about them.
 

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I did not say people come on here to complain! and, I realize GM has issues with the injectors, more so than what there should be. But people come on here to learn and share information, and a lot of the information that is shared on here is problems that they have had, be it injectors, transmissions or whatever. My point being, We don't get on here to say, Hey my injectors are working correctly, that's great. Those threads are few and far between. And there are many many trucks out there and probably with a load of miles that have not had injector issues.
 

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Kawtipping, when you say you are still on your first set of injectors, are you saying that the original ones were replaced or you are still on the original set ?
Thanks
 

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OK John. First you say injector issues are overblown - then you say you had injectors replaced at 80,000 miles. Your truck is an 02 and the seven year injector warranty will likely lapse less than two years from now. It would appear that having multiple injector failures isn't that uncommon. How comfortable are you that you won't have to replace the injectors again after the injectors are out of warranty?

My point is that seven years is too short a time to adequately warranty these defective injectors. They should be covered for 200,000 miles regardless of time. I bought this truck with the expectation of keeping it for 10 to 12 years but I'll probably trade it before the injector warranty expires. I'm reluctant to take the chance on spending four to five grand out of my own pocket when it's obvious that many of these trucks have or will have injector failure. I think it would be in all of our best interest if more members voiced concern about these injectors and put pressure on GM to extend the warranty a more reasonable 200,000 miles regardless of how old the truck is. If there really aren't that many trucks with problems, then it won't cost GM much will it?:rolleyes:
 

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john fank;1569845; said:
I did not say people come on here to complain! and, I realize GM has issues with the injectors, more so than what there should be. But people come on here to learn and share information, and a lot of the information that is shared on here is problems that they have had, be it injectors, transmissions or whatever. My point being, We don't get on here to say, Hey my injectors are working correctly, that's great. Those threads are few and far between. And there are many many trucks out there and probably with a load of miles that have not had injector issues.
Personally I feel John Frank is correct. The only feedback in threads you'll see is people posting with their problems. Alot of members here. So alot of injector issues. Me, I have an 03 LB7 I bought new, 83K and no injector issues yet.

But I do the PM, all the fluid changes including trans filter, fuel filter, oil filter and etc... Most peeps who post on this site are looking for answers to problems their having. There are almost maybe 500 threads dealing with injector issues. And 125,829 total threads, with 1,325,103 posts and 47,208 members. Really a small percentage overall, IMHO..
 

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A small percentage wouldn't prompt GM to have the extended warranty on injectors to go past the original 100,000 mile warranty. Then in the last 6 months extend the warranty to the 03.
 

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SteveFord;1570976; said:
A small percentage wouldn't prompt GM to have the extended warranty on injectors to go past the original 100,000 mile warranty. Then in the last 6 months extend the warranty to the 03.

I agree completely!! They know there is a serious problem or they wouldnt be eating the cost of them. Honestly i blame bosch more than gm its there sorry *** injectors that are going out. Im not saying dirty fuel isnt contributing to the failures but im on my third set right now. The second set lasted 5K, i even cut apart my filter to see if i had gotten some bad stuff through and it looked very clean with no debris. When i took it in to have them replaced i made the mechanic check the CP3 because i thought i was getting metal shavings coming through, i assumed something else was wrong because there was no reason for them to go out that soon. Everything else checked out fine so they told me i had just gotten another bad set. I havent had any issues with the 3rd set yet, but there is only 4K on them right now.
 

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Actually, its been said that Bosch is 'eating' the actual costs rather than GM. I'm wondering if initially, at least, some of the early repeat failures were result of the techs learning curve?
 

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I read a post on here that when someone changed their injectors the fuel lines were full of corrosion? Maybe that's the reason for injector failure.
 

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I bought my truck new in Oct. of 2001. I have 107K miles on it and am still on the original injectors. I believe they are covered by GM for 200K miles and 7 years. So far, I have been fortunate. I have done all services at the "stealer" and change the fuel filters along with the oil changes every time now. Only problem I have had is with the lopey idle, which got fixed under warranty. The truck is paid off now and I intend to drive it a long time.
 
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