I have 1979 ford bronco that I put a 79' 460 in, but it has a big bogging problem an I cant get answers any were im hopeing someone her can help. It will run fine for about 2 minutes and then start bogging and loses all of its power at that time I knew it was out oime and needed a timeing chain so I put a new timeing chain in thinking that would fix it but it did nothing I checked the plugs, wires, distributor, rotor, and ignition coil, all were fine then I checked the fuel pressure and it was low so I changed the fuel pump and it ran grate for a day I thought I fixed it but it started bogging again now im thinking carburator problems it has a carter afb carburator on it. Someone told me to clean the fuel tank and the lines change the filters and clean the carborator and that should do it but if that was the case shouldn't it be running like crap all time not just after 2 or 3 minutes then I thought can it be vapor locking the fuel line is running about 6" away from the exhaust manifold and it is a steel line dose anyone have any other ideas I would really appreciate it.

 

Sounds like the carb float to me