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Drained my fuel bowl today and found this. Any thoughts as to what the brownish colored liquid is? I've never seen anything other than a little water or a little debris before. It's obviously heavier than the diesel, but the X hasn't been running strange or smoking so I don't think it's affecting anything. Just curious what your thoughts are.
Thanks for answering! That's one heck of a thread. I've already done the hutch and harpoon mods, thoroughly cleaned the tank, installed a pre-pump filter and cleaned the fuel bowl (along with the X/C spring mod and some other non-fuel related upgrades). Both filters are less than a month old. I've never seen this particular brand of crap in my fuel before. Guess I should be more picky about where I fuel up.
Most of the brown gritty stuff in mine was below the fuel heater and Water-in-Fuel components, hard to see, and barely able to touch with extended fingers
Did you remove the bowl? IMHO, that is the best way to clean it. I cleaned the inside with a little sandpaper and flushed out all the openings.
It's a good time to add a 90* adapter to the plugged outlet near the bottom fuel outlet, for a fuel pressure gauge.
I believe it was all rust and junk in mine. From the pumps, the filler tube, fuel lines, the fuel rails, etc. Keep in mind, fuel is always being recirculated from the tank to the pump to the fuel bowl to the heads and back to the tank. For 13 YEARS!
I also removed the check valve in the center plastic stem of the fuel bowl. Potential source of failure and no real benefit, IMHO. (good advice from a buddy)
Cleaned it while still in the truck. Two torx screws to get the heater out and a hefty dose of brake cleaner and rags every oil change. Haven't done any mods to it yet because nothing has broke.
Whatever it is gets caught in the water block screen. I tried talking to Shell about it (where I always get diesel) and they say they only guarantee the quality of their gasoline, not diesel. As far as I know this hasn't caused any damage, but there's quite a bit getting caught. I've drained the bowl three times on this tank and it's still in there. Sure looks oily swirling around under the diesel, but that could just be an illusion. I'll try to post a better pic when I drain it next.
I don't know, but could it be oil? What you're describing sounds like oil.
I've not deal with oil in fuel, only old rusty, grime and stuff, gritty stuff.
How's your truck running? How long (secs of cranking) does it take to start when cold (injector orings or air)? Does it feel weak or noisy (air in fuel system)?
When you cleaned the fuel bowl, did you replace the parker sleeves on the fuel lines? Mine were completely destroyed but not leaking fuel.
Air for sure, but it's shocking how much air was in the system from the fuel bowl orings, parker sleeves, before Hutch mod, leaking rubber supply lines, etc
