HELP No start after fuel filter change 

Your fuel is draining back to the tank. Somewhere you have air getting into the suction side system. If it was ok and you changed fuel filters(oil change) take a hard look at that filter assembly on the frame. There are many styles of frame filters and it is usually an oring. The plastic housings or bowls can develope small cracks after time and not seal overnight but are ok once running. Your symptomes of rough running and hard start are typical of suction side fuel system issues allowing air in. The fact that you filled that filter and it then started tells you the fuel system is having issues with air entering. Find and fix that air problem and your good to go.

@@ENGINESHOPJOE thank you very much I just ordered the tool for the water fuel separator and will get a new filter and take it all apart and do it my self very carefully

@@mll809 Let us know how it works out. It's good to save money.

@@ENGINESHOPJOE i just put the new filter i the fuel water separator. I clean it and checked really good everything seen fine, changed then O ring but notice I didn't have O ring in the top cap fill it all the way up with new fuel, prime it (turn ignition on) once with out the top cap and the fuel it went down re fill it put the cap and prime it again did it 2 times with cap and 2 times with out the cap one of each (first with out cap then with cap then again with out cap then with cap ) fill it all the way up in the last one and started and then did started. It started just fine but now the fuel water separator Is almost full with a brand new filter is this okay? Or it will go down once the truck is moving ?.... BTW thanks hopefully this does fix my starting issues.

@@mll809 see the video i will post today I have a few things to say but generally speaking I would not worry about the fuel up to the top.

Thanks for sharing and I am glad you got her running.

Im not sure what fuel system is on that engine so I can't comment on how to proceed

It was an ISX and our fleet is only paccar units. Thanks for pointing that out.

There are primary and secondary fuel filters. The secondary fuel filters on Common rail engines filter to 4 microns. That is dirt invisible to the naked eye. The filter media is so fine you really cant "suck fuel through the media or filtering element" So they push it through by making the filter assembly pressurized. Most have between 65-200 psi in them when the engine is running. The filter on the frame or primary filter is somewhere between 10-30 microns and those have fuel pulled from the tank through them. That is done by a mechanical gear pump sort of like a hydraulic pump works.

Any engines with electric priming / transfer pumps running that pump a few key cycles will prime the fuel system low pressure side. But some procedures are engine specific.