My guy drove the truck and it started smocking more and more and started dying but would restart in few minutes and then would restart harder and harder. Took the truck in, showed problem with injector #4. Replaced. While at it, did EGR delete and oil change.
Truck started up nicely and drove for about half the day without any problems, then started dying again. Hooked up the computer, showed - P0263-Cylinder 1 Injector Circuit Contribution/Balance Fault. Would only show it when KOER is done. <?xml:namespace prefix = o ns = "urn:schemas-microsoft-comfficeffice" /><o></o>
Replaced injector 1. Would still show same code. Truck drove for couple of hours and died again. So, I figured that truck warms up and dies, so sounds like HOPP problem. Checked ICP reading, showing as desired. When warm, would not restart and cold, would restart right up. <o></o>
Checked the oil and it looked too thin. Changed the oil, truck starts right up weather cold or hot. So, something getting in to the oil, in my opinion – fuel. <o></o>
Summery: fuel getting in to the oil and makes it thinner, so when it warms up, it shutting the truck down. <o></o>
Question: how is it getting in to the oil and how to stop it. My only guess that something is not right with cylinder #1 as I replaced the injector and it is still showing me same code. Will it stop fuel from getting in it if I unplug the wire harness from #1? Assuming that it injects fuel only when it gets electric signal that should work until I figure out the problem, but I need the truck for now, and I surely do not want to change the oil every half a day.
Sorry for the long post and hope you could follow it.<o></o>

 

you can't just guess the oil is thinner and that fuel is diluting it. you should get a blackstone report if you suspect an oil issue. It's about 20 bucks I think.

 

Leaking injector o-rings can result in fuel dilution of the oil as I understand it. ALL diesel's have some fuel dilution in the oil. This is one reason I get a UOA (used oil analysis) every time I change the oil. I do not question the oil's ability time-after-time to lubricate AND I am not trying to extend the OCI. The main thing I am looking at is water, fuel and soot content of the oil. This will keep me from problems getting real bad before I realize my oil has been compromised.

Bottom line - get an oil analysis.

Blackstone can get you kits in two days, two days to get them the sample, and two more days to have the results via email. Blackstone is the most commonly used company as far as I know. They may give you special service if you call them and explain your situation (ie email you the instructions and the form to fill out and then let you use one of your own bottles to save time).

If you do not like Blackstone then use one of these:



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Tank you. I assumed that it is fuel In oil because I just replaced oil few days ago, and today, when I drained it, I had an extra gallon of it. If I had gallon of water/coolant in it, it would be like a milkshake, but fuel and oil get alone pretty good.
Like I wrote above, I get same code on cylinder #1 before and after I replaced the injector, and no other codes. So my assumption that problem is with #1, but what? Rings, piston, etc? As far as leaking seal, I do not believe that because less then 5k miles ago I replaced all 8 injectors and few days ago I replaced #4 because it broke in half and couple of days ago #1 because I had code, and replacing injector was the easiest thing to do, and I had new one as spare.

 

A gallon of fuel in the oil !!!!!!!!!!

Fuel dilution over 5% causes problems. A gallon is like 25%. I am sure sorry to hear that your problem is that bad! If it is driveable after an oil change - don't do it! You don't want to create even more problems.

It is possible that the mechanic doing the previous work did something wrong. Maybe someone else can help w/ other ways fuel can get into the oil. I would think that the other routes for fuel getting into the oil would be very unlikely. Hopefully a tech will see this and help out.

 

I am my own mechanic and I changed injectors more then once, so I do not see the problem with that. What I think, but I hope there is someone to confirm it or deny it, injector sprays fuel in to the cylinder, but because of bad rings, let say, there is bad compression, not enough to fire it, so fuel just goes in to the oil. Or may be a head gasket, and piston just pushing fuel in to the oil that way? But my truck is bone stock, the only thing was changed on it was EGR delete, but that was done last Saturday, after I already pulled the code.

 

[quote=bismic;6052841]A gallon of fuel in the oil !!!!!!!!!!
If it is driveable after an oil change - don't do it! You don't want to create even more problems.

According to my theory, injector only fires fuel when it gets signal, so I disconnected the wire harness from #1 cylinder and will drive like that for a day or so and check the oil level again, just to prove that the problem is in cylinder #1. I do not believe it will harm anything other then little loss of power, but even then, #1 cylinder didn’t work anyways, so the power wouldn’t change. If level stays the same, then I know it is #1, if level goes up, then it is either leaking seal, which is brand new, or problem with other sylinder/s.<?xml:namespace prefix = o ns = "urn:schemas-microsoft-comfficeffice" /><o></o>
Any other help?<o></o>

 

I hope you are correct in disconnecting the wire harness. I would think engine and turbo bearing damage can happen quickly with the solvent properties that diesel fuel has.

 

I changed the oil, so it is pretty clean, it may have some little fuel in it, but it is less then 5% for sure, and I will change it again soon. A lot of people use diesel fuel to clean gunk out of diesel engine at the time of oil change, so I hope nothing else is going to happen, as I already spent thousands of $ to keep this truck running, I could probably just buy another for that amount, and I am talking in parts alone, as I do all my own work.

 

Vitaliy,if you all ready changed the injector what makes you think the new one is bad?The gallon of fuel in the oil makes me think you have more than one injector causing problems or you would have hydro locked the motor by now. What did you torque the injectors too and did you change the o-rings and copper gasket?

 

No, I do not think the new one is bad. I think the cylinder lost compression and does not ignite the fuel it gets from the injector, so the fuel has to go somewhere. It is either going thru bad HG to the oil channel and/or it is just leaking down the block if rings are bad.
As far as o-rings and cooper gasket, that was part of new injector set, on every injector.

 

You said that #1 injector was broken when you changed it. Could the fuel have gotten in your oil from the broken injector. I don't know why you are getting the codes but That was my thought after reading your post.

 

Pull the glow plug and pressure test #1.

 

No, #4 was broken. I pulled codes out and it only showed me for #4, so when I took cover and oil rail out, I noticed top part being disconnected from the bottom part (if you have ever seen an injector from 6.0, it has some 2 bolts holding top part to the bottom part), those bolts were broken. That part of injector only has oil going thru it, fuel goes in thru the lower part of the injector, so that was not it and I replace the oil after I replaced the injector, so oil was fresh.
After that vehicle was still missing, so I did KOER ( Key On Engine Running) test and it showed me code for #1. I replaced it and code still coming back

 

I have never done GP in 6.0. What’s the best way to take them out and where would I borrow or buy pressure tester, as I bought one from Napa for my 7.3 before and it didn’t work.