If I unplug ac pulley on a 2001 ford f 150 will noise stop
Bad A/C compressor.
No, probably not. If the noise is present when the ac system is turned off unplugging it will not help. The clutch on the ac is probably shot. If you look at the front of the compressor you can probably see it handing out and partially destroyed. You will have to remove the belt and attempt to locate a shorter one which will run the rest of the system.
Search Ford F-150 Questions
Are you a UK consumer? CarGurus now has a discussion forum in the UK.
Ford F-150 Experts