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Looks like he had a clean fuel filter, that leaves the tank pickup. All the smoke something is not right if it is getting plenty of clean fuel. You are right the ATF will not do anything for the growths in the fuel but might degunk the pump and injectors, cheaper than a rebuild, Worked on the old Cummins and Cats before low sulfur fuels. Two trucks, dropped both tanks, one twice!
You are correct sir there is a bypass in the round end. My 998 had so much algae and rust gunked up it was pretty much stopped up completely. An acid dip fixed it. The 1123 had split open along the side. Dremel tooled off,new one was press fitted with epoxy. The white smoke indicates the real problem "may" be elsewhere but one step at a time ,clean fuel, clean air. It's a diesel, suck squeeze bang blow. Sorry I don't take pictures I just fix stuff.
This end is in the fuel tank correct? I havent yet dropped the tank and looked inside.
If your truck has the rectangular cover in the bed behind the passenger seat side, remove that to reveal the fuel sender. Round thing 2 wires 5 or 6 machine screws. Pulls straight up. These things are translucent and you can see in them easily. The pickup with the sock is straight down. The box like surround is a fuel trap to keep fuel around the pickup when it starts to run low. (They come loose sometimes) A small amount of debris/rust particles should not be a problem. Water or algae is a problem (visible water under the fuel, you can see it, algae turns the fuel dark amber and can look like slim floating in the bottom) Go to plan B if no inspection cover, drain the fuel (full holds about 25 gallon or so, black plug on the front end. Replace with the factory plug rated for fuel use per Steve/Retired War Horse. (Steve is plan C) Getting the plug out if its old is sometimes difficult, trim away the visible part and push it inside. If you get a considerable amount of slimy stuff out this way its probably time to drop the tank. Eyeballing the inside of the tank gets you to the point of knowing that you have a good flow of clean fuel. At that point if getting some ATF into the pump and injectors does not do the trick, plan C, CALL STEVE. You will have gotten into pump and injector territory. Keep us informed please.
swagelok flex hose does not do that
Since no one likes to look in the TMs, I did it for you. The fuel system troubleshhoting section is around page 2-95 of TM 9-2320-280-20-2. There is even a section on "how to use the troubleshooting guide".
I just read that. Btw, I do like reading the TMs. It has helped change trans oil cooler, seats, batteries, vent lines, etc. Just wanted an eye ball on the issue is all. Taking the plastic bottle to truck now. Will update. Thank you for this. Perfect timing.
You can open the valve whenever you want. I was just stating that leaving it open while running, as in the video, any pressure going out the valve will not be pushing fuel to the IP. If the lift pump is working properly, with the engine off and not cranking, you will get liquid out of the valve from residual pressure in the filter can.
up in the corner fuel or pump. Pick up on some of the tips before busting a nut... bolts too... Note: Pump removal, push pin, filters, vents, return lines, hoses, tricks, etc. Smart to go tank to IP... check or clean or replace. Quick fix I get it... then something else. It's all easy cuz we all have been there done that. Got eR done drive it up to the Desert (Rosamond) for a test run. Good luck.
Before you remove the pump(lift pump) remove the vent hose ON THE TOP OF THE FUEL PUMP. It should be dry. If you have a bad enough fuel pump to cause the shut down it should be squirting fuel out the vent when running. Let us know what you find.
If there is fuel at vent port.. there's a good chance fuel is finding it way to the engine oil. That could be bad news.
That looks like a nice mod to have. And useful information. Did you do a how to on installing that gage?
Those check valves get clogged with algae and gum up the check valve, a quick cleaning and they are as a good as new, but you must treat the algae issue too. I’ve had several auctions trucks lately that require a complete fuel system rebuild.
Is there a treatment for the algae that will eliminate it from the fuel system? Biobor JF Biocide or something similar?
