6.0 and B100 problems?

[PGreenSVT]

That's some nasty looking stuff for sure. Is your fuel system stock or have you changed some hoses etc. It almost looks like it is either a tank lining membrane or non bio compatible lines dissolving.

[StorminNorman]

I suspect you may have a slime infection. Give it a treatment and see if it clears up. Killem is probably the best biocide available. Here Click on Chemicals in the left column and page down to Killem link.

[yaric008]

Originally Posted by my red-rocket

Quality is pretty good i think. Passes the 3/27 test no problem plus my dad runs the same fuel in his truck no problem. We dry wash with magnesol, filter with a 1 micron nominal sock to remove the magnesol, then centrigue, and finish up with a racor 2 micron filter. We are located in southern New Mexico and get down to 20F at night but never any lower normally. My truck is always in the garage. I have a plastic tank, but so does my dad. The only thing that is different from my dad's truck and mine, except for the fact his is an 08', is that when he replaced his filter he used a motorcraft filter and i used napa gold. The last filter change i did i replace with a motorcraft just to see if that would make a difference.....if it doesn't help i really don't know what else the issue could be.

The only time I've had any problems with my biodiesel is when I did some magnesol experiments. I tried filtering it with a sock and a 2 micron filter and all that good junk and I couldn't get the magnesol out. The next week or two I had starting problems and when I pulled my fuel filter I found a bit of goey glycerol. I'm not really sure how that glycerol got there but I suspected it had something to do with the magnesol. Maybe that is your problem too somehow and your dad is just lucky for the moment. If when using your magenol you're not using enough to sufficiently remove all the free glycerol it may be getting stuck in your fuel filter which is what I suspect happend to me that one time... anyways, just a thought.

I'm not really sure of a good test to see if you're magensol is doing it's job completely and/or you're filtering it all out. The bio would still easily pass the 3/27 test even with free glycerol and magensol still in there.

[my red-rocket]

Fuels system is stock. I thought about tank lining but it's a plastic tank so I don't think it would have a plastic lining also, not sure though. I also, thought about a bacteria build up while sometimes my truck will sit for a week or two. I'll probably try the killem just to make sure. I've heard about people having problems filtering out magnesol, that is why we are looking at switching to ecopure but we do filter the crap out of it. First the 1 micron sock, then a centrifuge, then a 2 micron cartage filter.

[StorminNorman]

The magnasol will go right thru a 1 micron nominal. That is why most producers have stopped using it. If you cut the filter open and find crap in it that is kind of gritty, it is the magnasol. If the plug is soft or slimy, it is soap or bacterial. I have the supplies on the way in to put together a soap test kit and should have it available by next week.

Norman

[my red-rocket]

Luckly the goo in the filter wasn't gritty at all. I'm going to order so of the killem to try that approach. Not to drail the thread but has anyone tried the Ecopure dry wash media? Thanks.

[Spencnaz]

The one thing that I was told that will kill a 6.0 is a drop in fuel pressure. The injectors really don't like it when that happens.

Magnesol as stated before will go right through a 1 micron filter. I"m not sure how well a centrifuge will remove it though.

One very active topic on some biodiesel only forums is the use of oak shavings as a dry wash media. Yes, you read right. Oak shavings. I'm still doing some more research on the subject while my truck is down with mechanical issues (doing the compression test today) to see if this will be a viable and economical system for further purifying biodiesel. Plus the fact that the used up wood shavings would make a very nice fuel for a wood burning stove, you would only have to use a little bit to get the same amount of heat as a stack of logs.

As for the goo, I'm following the reasoning that it's a bacteriological infection. Sure looks like diesel blooms to me. I could be wrong however.

Have any of you pulled the injectors on your 6.0s and had them tested after you had this filter issue?

[my red-rocket]

No, I haven't checked my injectors. Truck seems to run fine. What are the symptoms that would indicate I need to check them?

[Spencnaz]

Unless it's running rough or smoking, they should be fine. Just remember to keep those filters clean, lower injection pressure will kill the injectors on the 6.0 from what I've been told and read from 6.0 owners.

[philhyde]

Just came across this thread, I and hope no body minds me resurrecting it.

My 6.0 just came out of the shop after a new FICM, 2 injectors, and new HFCM. Initial problem was rough running/missing.

History is that I started running B50 in this vehicle about 2 months ago. Filters were changed about 1 month ago and then the vehicle was driven 3000 miles towing a 4000lb trailer. Along the way in Illinois I picked up some pump bio (B5 or B10?) but the rest was all D2. A couple of weeks ago, I filled up a mostly empty tank with B100. I'd guess the tank was B90 or better. Toward the end of that tank is when the problem started.

I have a long history of running bio in VW TDI's, and I guess they are much more forgiving. I am having a hard time believing that the bio killed my 6.0L, but it looks like a clogged filter is the likely culprit. Diagnosis from the dealer is that the HFCM dying is what took out the injectors. They didn't say anything about dirty/questionable fuel. They said the fuel was clean. So I guess I'm kind of hoping that I had a bad HFCM and that is that.

But I can't help but think that my inexperience with this engine contributed to the situation. If I had recognized how sensitive these engines are, I would have been more diligent about changing the filters.

You can bet from on that I will change them frequently!

[Dirtcheap]

how long do go between fillups? the starts growing when there is air, and room i.e. less than full tank that sits for any period of time.. i had a couple of filters that lokked like that in my D-MAX... to long of a filter change interval and long time between fill ups ...