Cleaning fuel line

I've had problems with lack of fuel to a single carb type 3 motor. Its been off the road a few years, tank was removed and water blasted clean. Line was blown through, new fuel hoses, fuel filter etc.

Had been running the car a week with no problems. I put some of that fuel system cleaner, thinking more about the carby as it hadn't been stripped down.

Now have problems with low fuel. carby kit turned up (32PHN carb) and installed. Fuel floats appear sound, not leaking.

I am going to run it out of a fuel tin (just idling), but it looks like the metal fuel line has a loose piece of crud which flaps around and shuts the fuel off. Is this credible, anyone else had something like this happen?

The line has already been blown through, is there another way of cleaning it out?

Any help appreciated, very frustrating problem.

yep i think you are on the right track i had a time when my rod would just stop cleaned everything and still no go turned out that doing all that cleaning just made some crud loose or gooeie and would start to block everything up remody change tank and lines good luck