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I have an 07 f250 and my water pressure gauge stopped working. I'm getting a steady stream of water thru the supple line when unhooked from gauge but the gauge is not reading. I sprayed compressed air thru the line and the needle pegs out. While I was out running my boat I unhooked the line from gauge and was also getting a steady little steam of water , I blow thru the line to push the water back before reattaching to gauge but still no reading at any speed ,I'm wondering if I may have a split in the supply line somewhere and when hooked to gauge I'm losing pressure thru the split in line or do I just need a new gauge??? Thanks in advance