Ford D5011 diesel fuel problem

I have a D5011 backhoe tractor that will start and run great for about a minute, then loses power and rpm, black smoke out the exhaust, and then basically shuts-off. I have read a few other posts about this issue and I have checked the return line to the tank. What I found is a pressure regulator(?) right before the tank. The line that attaches to the intake manifold was full of fuel, which I am assuming is a bad thing. Anyway, I cannot find anything at all on this regulator. I do not have a manual at this point but I am planning on purchasing one asap. Until then, any help will be greatly appreciated!
 
Sounds like injection pump problem. That line and what you are calling regulator is a resivour for thermostart system whitch is a cold starting aid. The model is a 4500.
 
Shaun-Thanks for the reply. The return lines from the injectors go into this unit. There is the line that goes to the fuel tank and then the line that goes into the intake manifold. Does this sound like what you are talking about?
 

Your 4500 has a paper air filter located in the front grill shell in front of the radiator, remove and check both the outer and inner filters, loading up with fuel sounds like it's not getting enough air.
That small line going to the intake manifolds thermostart unit should be full of fuel, but shouldn't be causing to issue your having.
After setting does it start back up easily or act like it's out of fuel?
 
I will check the air filters. The tractor will fire right back up no problems at all. It starts to loose power/rpms pretty quickly. Am I able to bypass this cold start resevoir and just run straight back to the tank? I see diagrams for both layouts.
 

Is the reservoir leaking or some other issue?
Yes you can run the injector return directly back to the tank and bypass the thermostart but unless it's leaking or the thermostart heater in the intake manifold goes bad there's really no reason to bypass it, it has no effect on how the engine runs.
They do make a handy starting aid in cold weather.

To restart and die like that something in the air intake is plugged up, filter or collapsed hose.
 
Injection pump timing, or seals? Any bit
of air in the fuel lines can muck things
up, see diesel leaking out of any
connections? Drained the water basket?
Checked the timing? Valves adjusted
properly?
 


Screaming barn, your problem is a VERY common one. As others have said it is NOT THE THERMO-START. FOGET IT!!. What you describe is exactly what happens when running out of fuel. You have enough flow to start it but not enough to keep it going. It is most likely plugged or improperly installed filters. Another common cause is a screen inside the fuel tank. You need to have fuel running a steady stream to your filters.
 

Also have seen the rubber splice hose between manifold and air tube collaspe and starve the engine for air. Especially when it gets warmed up and softer. Lots of folks have used a water hose to replace the original hose, and its too soft and will suck closed.


If fuel starvation, its usually white smoke? If air starvation it is black smoke... The stopped up screens or floating glob in the fuel tank is more likely though, based on your description... A floating glob will move around the tank and as it happens to get close to the tank drain, it will stop the flow of fuel.. then when the engine dies and the suction stops, it will float back off the drain and tractor will restart and run fine till the gooey glob happens to get close to the drain again. Or the screen is mostly stopped up and when the engine is under load and needs more fuel, it starves for fuel... or you have a rubber hose in the fuel line some where and its full of cracks and sucking air , thus starving the fuel. Or filters are full of water or stopped up....
 

I thought about a fuel starvation issue but he said it will fire eight back up after setting for a minute or so, if it was fuel starvation you usually have to bleed the air out and crank it a lot to get the injector firing again.
That's why I think something in the air system is plugged.
 

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