How hard is it to run new lines? I’m pretty good at messing with cars and changing things out. This is just my 1st carburetor car. I’ve read the fuel sending unit just measure the amount of fuel in the fuel tank and communicate the fuel level to the fuel gauge on the vehicle dashboard. So just leaves fuel line or pump?It shouldn't be up and down, that constantly.
You now have to figure out the issue with getting the proper flow of gas to your carb in this situation now.
1. Is it the fuel pump?
2. Is it a fuel line?
3. Is it the sending unit, inside the tank 😎💪