Truck: 2003 F250 6.0 - 173,000 miles
Upon starting my truck one night I turned it over and let the fuel pump and glow plugs heat up before turning the engine on, immediatly I heard a noise coming from under the hood and it was very loud, opened the hood and it was my vacuum pump
Video of the noise it was making:
It has never done that before but I didn't think anything of it, now driving down the road I went to put my A/C on and realized it was only blowing out of the defrost vents and will not come out of any other of the vents.
My 4WD still works and so does my cruise control , so does that mean the vacuum pump isn't the problem or is it something to do with my AC? Would buying a new vacuum pump solve this problem so I can have A/C through my vents again?