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Discussion Starter #1
How many miles would you think a set of injectors should last. I have not had any issues but I'm wondering when is a good time to just change them as part of maintenance.
 

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I don’t know if I’ve ever heard of anyone changing them as regular maintenance. More so when the truck starts hazing white smoke all the time. But, our trucks may not haze with the DPF and all, that was an older diesel tell-tale sign.

Short of monitoring the balance rates of the injectors one way or another, I don’t know honestly.
 

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Discussion Starter #3
Wonder if I can get a monitor to show that or run the truck with data logging on my lap top. I'm not to savvy in that department.
 

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You can get a monitor to show it. Like the Banks nDash I think it is. My autocal that I got with tuning the truck also shows it if you leave it hooked up to the obd port.
 

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Discussion Starter #5
I have the auto cal from Duramax that I got when I tuned about 2 weeks ago. Injectors won't last forever and Im trying to get 350000 out of this before it gets retired.
 

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It depends greatly on fuel quality and if a good lube additive is used with each fill up. They may last less than 100K or they may be a lifetime component that goes over 400K. It is not uncommon on the big Duramaxes with aftermarket FASS lift pump, separator / filtration systems (those trucks needed this system as they had no lift pump in the tank and apparently not great fuel filtration) to essentially go "lifetime" on their injectors.

Our trucks have a lift pump in the fuel tank so we do not need to worry about that. We also have a dual fuel filter water separator box with a water sensor that will display a message in the DIC if water is found. I like to think GM learned from the older big Duramaxes, and that our fuel system's filtration is adequate.

If the truck ever misses or does not run right, have it serviced immediately. With today's extremely high pressure common rail fuel systems, either these these engines are running perfectly or they are potentially damaging themselves. It is not like the old days in the 70s (truly the nadir of car manufacture) with our gas engine's leaky carbs and points ignition, where missing and crappy running at times was "normal".

I think with diesels what you put into them is what you will get out of them. Take care of it and it will take care of you. For me this means changing the fuel filters and checking for water every 20K and using lube/cleaner/cetane additive with each fill up.
 

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Discussion Starter #7
I have not used fuel additives yet and I have 178000 now. Still on the originals. I'm not having any problems yet.. i am on top my services as I am doing almost all of it my self.
 

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That is fantastic! I think yours is the highest mileage diesel twin I have heard of. Is it stock?
 

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Discussion Starter #9
I just tuned with Duramax 2 weeks ago. Eibach pro truck shocks and springs running 265 70 17. Up until then truck was completely stock.
 

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Discussion Starter #10
So started using the Lucas complete engine treatment. I filled the tank and reset the trip to watch mpg over the next 5000 miles. Fuel filters are fresh so I can see if they get dirty faster than normal or pick any thing up. I'll use a second can at the next fill up on Friday or Monday.
 

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How many miles would you think a set of injectors should last. I have not had any issues but I'm wondering when is a good time to just change them as part of maintenance.
I have over 202,000 on my 2015, only problems experienced was due to manufacture's (GM) screwed up def programing. Never used additive deleted at 200,000 and running better than ever. 4x4 at 70 mph over 30mpg
 

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Discussion Starter #12
That's awesome. I'll delete when it becomes a problem if I can if not I'll try a EGR and intake cleaning. I've pretty much got to get 350000 out of this truck.
 

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I have not used fuel additives yet and I have 178000 now. Still on the originals. I'm not having any problems yet.. i am on top my services as I am doing almost all of it my self.
Hi have u changed the timing belt on ur truck and if so how much was the labor and hard it is to do can a regular gas mechanic do it or will I need to take to diesel mechanic. Thanks.
 

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I have not used fuel additives yet and I have 178000 now. Still on the originals. I'm not having any problems yet.. i am on top my services as I am doing almost all of it my self.
Hi have u changed the timing belt on ur truck and if so how much was the labor and hard it is to do can a regular gas mechanic do it or will I need to take to diesel mechanic. Thanks
 

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Discussion Starter #15
Yes I have done the service at 150000. It ran me around 800 at the dealership from what I read it was pretty involved and I didn't want to go through it. A little uncertain about my ability to get it right and really didn't trust just any body to do it around me. Most of the locals here are just used car dealers. I wanted to have a gm tech do it just in case there was a problem.
 

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Discussion Starter #16
So I ran the Lucas in my fuel last week 598 miles on that tank which is near average. Now I'm half a tank into my second tank and I have a P11B3 DCT bad o2 sensor. I know I have alot of miles on the truck and I don't consider this a real problem in fact I'm kind of impressed this is my first DTC. I'm wondering if the additive helped throw the code. I just tuned around 3500 miles ago but I do t think that's the problem.
 
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