Diesel fuel system
#1
#4
How do you check fuel pressure when it is a mechanical pump. I already know that it holds average fuel pressure while it is running. As it seems to starve itself and die the pressure goes down. It has a new fuel pump and fuel filter. The only way I can get it do run is by removing what I think is the main fuel line to atmosphere. When the fuel squirts out I can reconnect it and it will start right up and only run for a few minutes. At that time it is running rough. Do I have air in the system?
#5
look on the driver side of the fuel bowl you will see the FPR(fuel pressure regulatior) bolted to the side of the fuel bowl at the bottom of the FPR you wiil see a black cap that covers what looks like the vavle stem on a tire use a stick style tire gauge and check with the truck running or with someone turning it over you need atleast 25psi to run but you want 60to70psi.
#6
How do you check fuel pressure when it is a mechanical pump. I already know that it holds average fuel pressure while it is running. As it seems to starve itself and die the pressure goes down. It has a new fuel pump and fuel filter. The only way I can get it do run is by removing what I think is the main fuel line to atmosphere. When the fuel squirts out I can reconnect it and it will start right up and only run for a few minutes. At that time it is running rough. Do I have air in the system?
#7
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#9
From what you are describing I would think YES. But if you could post a picture of the actual "what I think is the main fuel line to atmosphere" hose that would be very helpful also.
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