2011-2016 LML 6.6 Duramax Cp4 injectors fuel rails and line replacement
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- Опубликовано: 13 сен 2024
- We replace the notorious CP4 pump, all 8 injectors, fuel rails and lines on a 6.6 LML.
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Automedic Garage does not own nor claim the rights to any songs in this or other videos. This video is intended for informational and entertainment purposes. Always follow manufacturer and professional practices/advice when performing maintenance and modifications to any vehicle. Automedic Garage is not responsible for any damages or injuries incurred from attempting work portrayed in this video.
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Nice job and well explained step by step. I actually have my 2016 GMC at the dealership getting done now. My truck shutdown on me and I changed the fuel filter but couldn't get it to start back up, so the dealership said the injector pump had gone out. Wish you was in my town! Thanks
Did you ever check the old pump to see if there were metal shavings? I had same issue. Took a chance and paid to only have the the pump replaced. Got it home. Had an error code. Had to replace 1 injector. Only one I would have been able to get to. Drivers side front one. Could access it after removing fender well. Another error code. Replaced rail return pressure regulator. Didn't have the computer to put the new injector # in. I heard it was for some kind of bias. All good now. Paid 2500 for new pump and install. Parts only cost for rest. Bought from mdi in Dallas. New duramax use Denso now. Personally, I would add lift pump for piece of mind. Big pain in rear. That was a lot of work you had to do. Chevrolet would charge up to 9k. They would also drain and flush fuel tank. The shop that replaced the pump wouldn't provide warranty because I didn't want them to do all you did. He said there were shavings but screen in tact so I risked it. Great video.
@@fieldtrailer I did drop the tank and clean also just didn’t video that and yes this pump was done. Didn’t produce any pressure with crank no start.
You did a good job when that pump goes down you half replace everything
Pro tip you can get that bolt behind the water line without pulling powersteering bracket you just use a swivel ratchet wrench
Thanks, I’m obviously not a dmax/GM guy, he begged me to do the job cause I work on his powerstrokes. Thanks for watching.
No thank you anyway I watched your video and actually found it thanks again awesome video!!!
Does it matter what injector goes to what cylinder as long as you keep track of the numbers
Yea,my 16 lol is currently in line for this. But having the cp3 going back in it
Great video💯💯💯💯💯
What about contamination in the gas tank, supply lines, return lines, and filter housing? Were they flushed?
Yes, I dropped tank and back flushed lines with diesel using a small electric fuel pump off camera.
also i did the same job with new 3" down pipe and up pipe upgrade and a cp3 conversion and added a lift pump. the cp4 will fail and there is no fix for its failure. you can add a lift pump and extend its life span but tha'ts about it.
I agree but customer wanted to go back with cp4
I know very little I did my thermostat on my 2011 lml and that was a sort of scary project for me. From what I hear the cp4s are doomed to fail, not if but when. The best route is to do a cp3 conversation. That's number one on my list (when I can afford it) wish I had the stones to do it myself. Awesome video man , although it may give me a false sense of my abilities watching how easy you make it look 👍👍
Thanks for watching.
It was intimidating at first it just takes time. To disassemble and remember where bolts and wiring snaps back together. Other than that this video gives you the basics. There are no tuning required kits now so drop in cp3 without recalibration and no timing of the pump. Great video and good job.
@@oldblue101rf if I understand what you said. You can just put the cp3 in without lining up the dots? And no recalibration? Is that right? Just curious. I think I want to convert mine over... right now I have an lml with cp4 200,000 miles.
If my CP4 On my 2016 failed what would I need to do to fix it and get it running again the dealership is quoting 10,000
How can I tell if metal made it to the high pressure side?
If there’s metal in your FCA it’s in the whole system
Very well explained video!! Thank you.
Wasn’t my best video, and I’m not a duramax mechanic but I tried.
Good video
Help us Thks
Hey man. Great video. Just what I’ve been looking for! I’ve got a 15 LML. I’m about to try this install with a CP3. What do I need to be able to program the injectors to the computer?
Also, any other pro tips would be appreciated. Lol
I use autoenginuity for all my bidirectional scanning needs. Under “special functions” there’s a drop down for injector programming and I just enter in the numbers on the tops of each injector. The thing to remember is you have to know what each one in for each cylinder number to program correctly.
I have a 2015 Chevy Silverado Duramax LML my CP4 went out Being your visual you stated you were going to replace rails and lines I was wondering aren’t you able to just flush out the lines and the rails what’s the reason we need to replace those parts
For 1 they come as a kit and with the cp4, rails, return, supply lines and injectors. You could try flushing, if flushed correctly it would achieve the same results, however I don’t want to risk any contamination nor want a return job. Thanks for watching.
It's like sand blasting. You can do a great job but sand will always be somewhere in any complicated part. ANY metal debris will wipe out the system again.
Good evening I just got done replacing the fuel injection pump and I had a line that I really don't remember can you please help?
Man not sure I can help like the video says this is t a job I do regularly. I’m a Ford and Powerstroke mechanic don’t mess with these much other than routine maintenance.
How many total hours labor did you have in it including programing and oil change? Minus video time.
Around 12
Was the reason to replace the rails and lines Couldn’t they just be flushed out
I have a 2015 Chevy Silverado Duramax LML my CP4 went out Is there a reason to replacing the lines and the rails can’t you just flush them out
Everyone claims you’re supposed to replace everything
@@chrismathewsmerriman2144 I never understood that myself. Why can't they just be flushed out. Maybe the time and expense flushing costs about the same as replacing. Seems like someone could make a finer fuel filter also to stop anything from the tank going past the filter and stop the nonsense of changing fuel lines and cleaning the tank.
no tools needed to remove the injectors. give them a slight twist and then twist back and forth with a light pull at the same time they will come right out. if you end up having to reuse you don't ruin the orings
I didn’t use a tool. I was stating “they make a tool”
How did you get the fuel rail crossover line out from under the turbo?
Got an update? I just flushed it and gonna send it. Almost done putting it back together
@@ivangutierrez7812did it work?
@@deboss8420 flushing it worked. Dont skip dropping the tank and cleaning it. Thats where majority of the debris will be
@@ivangutierrez7812 Bro, what did you clean it out with and how?
I’m stuck on this part right now and almost started taking the turbo off.
How much mechanic shops charge to get this done ?
The parts alone in the video was almost 4K plus what I didn’t show was dropping the tank and flushing the fuel lines. Prices vary but generally parts and labor are between 8-10k
Why didn’t you do the cp3 conversion. That way you don’t have to worry about the cp4 time bomb
I did what the customer wanted. I couldn’t convince him to do the cp3. Is what it is I got paid either way.
@@AutomedicGarage Customer must have money to burn. No way was a CP4 going back into my LML. Fortuneatly the shop had just put in an Exergy fuel meter and it was idling and the CP4 failed. They didn't see any reaason to replace all the lines and injectors. I gave them a CP3 conversion kit gift. Now I'll set and wait to see what happens on the class action lawsuit against GM. Now they owe me!
@@timw8228 wasn’t my call, customer showed up with box full of new parts and a truck he wanted fixed. I mentioned the cp3 but he was persistent on doing the cp4. His money not mine.
@@AutomedicGarage Yip I understand. After I saw some replacement cost even the shop I use told me an ambulance they did was $14,500. I said oh he11 no I don't want that. Like I told someone else. You can pour all the lube in the tank. That is a flagrant design flaw in the CP4.that no lube is going to correct. You're just gambling.
Plus I know I wouldn't even touch a used LML if I was looking to buy one that wasn't converted. It's a plus if I wanted to sell mine.
You don’t have to time the CP3 pump like the CP4.
Did I hurt anything doing it? Nope
@@AutomedicGarage Just thought I’d give you a heads up but I won’t do that anymore. Don’t wanna hurt no feelwinz and wind up, CANCELED!
@@Webedunn no cancelling here, we ain’t woke. I’m not a GM/duramax mechanic, I mainly do all Fords/powerstrokes and Cummins. Customer had a duramax which I usually only work on his Powerstrokes and he really wanted only me to do it. Thanks for watching.
@@AutomedicGarage fair enough.
@@AutomedicGarage I meant no disrespect champ, I just figured I’d give you heads up in case you do another CP3 and it may save you time. I’m not a Mechanic but I’m doing a CP3 on my Duramax right now and watched S&S video from a Duramax high performance shop. I actually find your video very informative. I’m a commercial/industrial Electrician so I’m not to smart to begin with. Again man, I wasn’t being condescending towards you, just helping others out. That’s our mission in this realm.
All that $$$$ wasted if he doesn’t install a lift pump
You can save a lot of money just not buying a duramax