I just traded in my 05 6.0 yes the one in avatar for a f450 08.....i opened the hood cause i was hearing a buzzing noise...it looks like a vacuum box or something. it does have a hose missing i think help?
sorry as I'm out of mind to judge what is the cause of your trouble there .. you have to wait until some apt reply doesn't come to you .. or the web may help you quickly otherwise if you are in hurry to sort it out well .. i guess there will be enough to suggest you best .
Sounds like vacuum pump for your front hubs may have the line off. It will continue to run until it has built up enough vacuum to satisfy pressure switch. Reservior for the pump is under degas bottle maybe line came off ?
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