Sorry,I thought that my truck info would end up on my thread.Anyway I have 2004 f-350 6.0, arp headstuds,egr delete kit,xdi intake,banks high ram,mbrp exhaust,sct elite tunes and pillar guages.I think that I heard the pump running when I turned the ignition on but am not sure if it is the "vacuum pump" from under the hood or not:bang:bang:bang