2004 6.0 issues PLEASE HELP
Injectors are great about throwing codes when they go bad, but you're not getting any of those. But, you are getting the 2285, and it can cause the symptoms you describe. I don't know why your tech didn't fix that first.
All three codes are about electrical issues, not mechanical problems. The 2285 is about the circuit going to the ICP being low. The engine and coolant temp codes are probably a wiring issue and not both of those sensors going out at once. I think both of those are on the same leg of the harness, the one that includes the engine fan connector, which is the connector/wiring most likely to get chewed up.
Not sure if you want to work on this or just want an opinion on what to do next. I can tell you what not to do next - don't go back to that shop. If you want to fix it, you'll need an diagnostic app on your phone called Forscan (<$10) and a wireless dongle for your car's OBDII port ($35), With the data it provides, we'd be able to walk you through the diagnosis. IMHO, you don't have a serious problem, but that tech you chose does.
Sounds like you are at the shops mercy unfortunately. This is not a good time to START a crash course in understanding the 6.0L engine.
We can help, but the learning curve is steep and it could take quite a while to get up to speed.
If it is diesel that is filling one or more cylinders, then that MIGHT be from running with low fuel pressure, and one or more injectors subsequently failing FROM that low fuel pressure.
Lots of things we could ask you to tell us and to check on, but that lengthy process may not be what you want or need.
Hard to say if the shop is dealing with you honestly, but they might be. Obviously saying they fixed it and then hearing them say you need 6 more injectors is plenty questionable. You need to decide if they have a good reputation with the 6.0L or not (and if they have an honest reputation or not).
There is a defined process to go through in identifying the cylinder (or cylinders) that are getting hydrolocked. You might ask them what troubleshooting they did ..... and then post their answer.
Buying and installing 8 injectors is a LARGE repair bill. Hard for us to help much at this point.
Are you willing (or able) to get the truck home and start troubleshooting it yourself? ....... recognizing that it can be a long process and it may not be an inexpensive process either. If you are new to the 6.0L and mechanic work, I would say that beginning with injector work might not be wise.
One thing you need to know about your truck is WHICH year model engine it has in it. The 2004 model year truck came with the 2003 engine OR the 2004 engine (and several varieties of the 2004 engine to complicate it even more).
Start out by learning about the high pressure oil system, and then determine where in the engine your ICP sensor is located. Post up what you find. It will either be behind your turbo or on your Passenger side valve cover.
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The statement about no "prints" doesn't make sense. The only thing close to blame it on "auto-complete" was orings ..............
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From the shop's perspective, they found two leaking injectors and replaced those. As a precautionary, they resealed the other 6 injectors since the two had sealing issues, and they don't know the prior work. That's probably what most of us would do.
You developed the problem again and talked to him on the phone, so there is no hands-on diagnostic. He's hearing another hydrolock but believes they fixed sealing issues on 5 and 7. Again, they have no clue where those other injectors came from, did a reseal, and were confident in that (with no hands-on check as yet), so the phone call guess would be there continues to be an injector problem with maybe poor injectors.
A phone call analysis is no different than what we do here; to do a proper check, it needs data and hands-on diagnostics. Once they had the truck to do that, they may find that it's the same cylinder(s) that have issues. Cylinders 5 and 7 have a history of head cracking above the injector bores, and what might be happening in this case. But until that shop gets the truck back to find out what cylinders are hydrolocking, the swag of other injectors being the issue is one of the phone/online guesses. Although the head cracking usually ends up with fuel in the coolant, not so much hydrolocking.
You may have to replace the head or do the in-frame injector crack fix. Or there's another issue that has hurt the injectors if they were good from the start. Such as fuel delivery.
Not sure why the others aren't concerned with the 2285, but you're getting advice from some guys who would know. It must be the logical result of these other problems.
Just find it odd that you weren't getting injector codes. Did you scan for codes, if so, with what?
The best you can hope for at this point - from us - is enough information to protect yourself, so you can ask some basic questions, exhibit basic knowledge and ability to oversight, so that you don't get bent over the hood. FYI, "why replace all 8 injectors?" is not one of the questions to ask. That's standard shop recommendation at this point and valid for all non-DIY customers. Others here might offer such questions better than I can.
But he'd have to air test for that if it reoccurs, and he doesn't seem to be at that capability. The shop might pick that up upon return.
Not sure why I'm in this thread ......
ForScan (full version for a Windows laptop, Lite version for a smart phone) is an OBDII software package and is one of only a couple worth having. Torque Pro is the other one that is worth recommending. I haven't seen or tried any others that were worth having.
As I posted earlier - you are going to have to decide just how involved in all of this you are willing/able to go. Then you need to tell us.
And one other thing - you have to buy good parts if you want any chance of a lasting repair on a 6.0L. This is an area where I have much trouble trusting a random shop. At least dealerships generally use OEM parts, and there are only a handful of parts where I would say definitely do NOT use an OEM part (the EARLY HPOP for example). USUALLY with injectors we recommend OEM remanufactured ones. BUT, there are a FEW decent sources for injectors OTHER THAN the OEM rebuilds. Mostly - the aftermarket (remanufactured) injectors are not very good quality.
With sensors and actuators - always buy OEM parts (electronics). Buy these parts from on-line dealerships to get a discount, but do not fall for all the counterfeits that are being sold (some from BIG NAME aftermarket diesel shops. Places/parts that I avoid when shopping for quality parts: Sinister, Pensacola Diesel, anything Dorman, Amazon, EBay......
You will need some good quality tools also - ASSUMING you want to do your own work.
EDIT:
Grizzly injector??!! Part # GA37681??
https://grizzlytough.com/partdetail....1&line_code=GA
Two injectors bad on one side, 330k miles, and all 4 injectors on that side were not changed?? Questionable decision (except maybe not completely bad since it looks like cheap injectors were installed).
Not looking good ............











