Black fuel filter(pics included)

Kind of. A leaking injector means it's dumping fuel when it's not supposed to, and washes the cylinder wall.

In this case, it's not sealing at the seat, so when combustion occurs, some exhaust pushes past the injector, and up where it doesn't belong. So soot can get in your fuel (depending on injector style) and in your oil (because it goes right past the injector into the valve cover, and now it's in the crank case).

You seeing more vapor than usual out your blowby tube?

 

Sounds like a bad wastegate or someone has some fancy program in ect and turned up. Black smoke is just unburned fuel. Yeah I believe it’s s but much for boost

 

I'd check the wastegate actuator for free movement. If good then see if it's being controlled. If no joy then on to the injectors. Maybe whatever is going on in your fuel tanks is the cause of injector problems.

 

i’ve had the same problem and have used this product with success

 

It could be algae, but not likely. Most likely combustion chamber gasses.

Most people assume it's from injector o rings, but actually it gets into the fuel through an injector tip that's not completely sealing off.

A fuel analysis can tell you for certain. Unfortunately, if it's gasses, there's no way to determine which injector.

 

I just bought 4 bottles at Wal mart. My Tanks are black inside. Been using that stuff and different bio cides for a while. No change yet. No slime yet. Even let it soak for a week with full tanks. Gonna try again. Had a bad injector, a while back, ran it a while that way. Might be from combustion gases. I still don’t know myself. Have had algae before. Couple tanks of bio cide clears it right up. Black slime looks like silicone. Can’t miss it. Floats on top of my spin on filters when I change them. Need a supply of filters. Really just primary in my case anyway. You must have a Davco? I’d think you’d see slime in it easily. Might be wrong.12.7 has copper cups. Over time the pounding of injector distorts the seat. A graphite crush washer is the easy fix. Along with a big fat O ring top washer, for the oil. O ring kits come with both, along with the 3 regular o rings for fuel supply and return valleys. They’re about $25 each at Dealer. Online much cheaper. Look them up, you’ll see. Originally the top O rings aren’t as big, and no washer for seat. The graphite washers are considered band aid repairs by some Mechanics. Others use them anytime they change injectors. Won’t hurt to use them. I prefer to. The graphite’s so soft, they crush down, and don’t even add any height to the injector. You could crush them with your fingernail. As far as fresh black oil, happens quite a bit. I’ve heard a lot of complaints about Detroit’s doing that. Mine does. When I change it myself, I let it drain a long time. Must be the angle I’m parked on? I get a better drain, oils not as black, but very soon turns black again. The design of the pan leaves some oil in the bottom. I’m going from 20k back to 15k Per Detroit’s Original recommendations. Since I’ve done an inframe. I’ve already pushed it to 22k last time. Only have 51k on inframe. Been idling a lot. See a bit of blow by or steam already sometimes. Usually in high humidity weather. It’s the 12.7 plague. Going to do a couple 10k oil changes. Had a bunch of sludge, due to excessive Lucas before inframe. Whatever the cause. Won’t hurt the engine. Can’t kill them!! I tried. Lol.

 

Let Us know if you figure it out. I hear about asphaltene. Like a thick asphalt coating on tanks. Hard to get rid of. Caused by injectors leaking or ?combustion gases. They have additives for that. But Ive read that’s usually a new emission Truck problem. That’s my next move.