Got some clogged fuel lines which means I gotta get them unclogged. Tried a new filter and nothing yet. Had the idea to disconnect the high pressure side right before it hits the fuel rail and to use compressed air to blow it out. Y'all think it would be possible to just unhook from after the filter and blow through the whole system? I noticed there are two lines, one that goes through the filter and then one that comes all the way back around back to the tank. I'm assuming this is some sort of return for unused fuel. Would it damage injectors or pump or anything else if I were to blow compressed air through the whole system?

 

Well first you have to figure out what caused them to clog in the first place, otherwise you can clear the current clog but then you would be right back where you started

I would disconnect from the rail and then from the filter and gently blow air through there, i would not blow air towards the pump or injectors

 

With 40 lbs of fuel pressure, it's damn hard for the fuel lines to get plugged with debris
Are you sure you do not have a failing pump and a tank that's full of crap? (old fuel residue)
Go ahead and take a sample but you can do damage with compressed air
Be careful & blow easy
Good luck