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Hello all, On my 05 250 PSD, there is a small "box" on the passenger inner fender with a couple of vacumme lines attached to it. It seems to make a buzzing sound(like a small hand held air compressor) from time to time and so I wondering what it is and if it is important (like if it is malfunctiong, will I be stranded). Sorry for such a "stupid" question but I'm new to diesels. Thanks!
yes, matt is right. by the way, Welcome to FTE! we are glad you are here. dont feel bad to ask a question, there is no such thing as a "stupid" question. we all have had our stupid questions..
