Diesels need to be clean and typically after 10,000 miles removing the fuel filter produces very little in the way of dirt and grit.
You had the tank and lines cleaned out and a new pump and presumably a new filter and still you find dirt and grit in the filter after a short time. ..
Either the tank, etc. wasn't cleaned out or more dirt has entered the tank since, either from more dirty fuel, from dirt ingress into the tank while the car is in use or the third possibility is something is wearing rapidly and the dirt is appearing in the tank to be recirculated after being sent along the fuel return line. If this is what is happening it throws suspicion onto the high pressure pump...
If the high pressure pump is failing it is surprising one or more of the injectors hasn't failed.
If you got dirty fuel the filter should have trapped everything that was likely to damage the injection system until performance reduced and eventually the engine stopped due to fuel starvation. Replacing the fuel filter with a suitable amount of care should then restore performance to the previous level.
Fuel filters are great for trapping dirt but not so good for other liquid contaminants. Water fortunately tends to remain at the bottom of the tank and the bottom of the filter cavity but other things might pass through the filter - acids, salt solution, solvents.
A couple of years ago there was a case of a few petrol filling stations selling fuel contaminated with seawater and shortly afterwards a lot of injectors needed replacing...
I think if my car had the problem your car has I would temporarily fit an inline filter to the fuel return line and drive it for a time. Two things should happen if the dirt is self-generated. The new inline fiter when cut open should show the dirt and grit you usually discover in the main filter and secondly, there should be a reduction in the amount of dirt and grit you find in the main filter, however any dirt at all in the inline fiter means my best advice is to take the car to a good diesel specialist for proper diagnosis and a guaranteed repair.
If dirt is found in the fuel return line there can be no half measures - the business end of the injection system needs surgical-level cleanliness.
Good luck!
SOURCE: 1999 chevy blazer fuel problem
probably not fuel filter . probably going to have to remove the upper intake and replace the fuel injector spider(fuel inj assebly) if it is droping fuel pressure it is leaking into the upper manifold
SOURCE: diesel fuel pump problem
All diesel full filters should be install with fuel in it.The engine has to be primed before it will run. Hope this helps.
SOURCE: 2004 dodge ram 2500 5.9 diesel hard to start
The lift pump is bad Check the fuel pressure with a test gauge.
SOURCE: 1998 GMC Sierra- runs rough then stalls when
had this problem on my neighbors 98 chevy truck with the same engine !!
it turnd out too be the fuel pressure regulator,you have too pull the upper intake too replace it!!
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