Hello I just ran across this thread and found it interesting , I have been using holleys billet 12-890 fuel pump with there billet 100 micron pre filter and billet 10 micron post filter all running thru 8 an hose and fittings mounted level with the bottom of the fuel tank all most like the tech article from modified mustang magazine . The problem is mine have been loud really loud I have been thru two of them the first failed after two weeks and I had it warranty returned and exchanged for a new one after several month the 2 nd one has started to fail also , they both start quiet but after a while they start to get loud and the valve that holds back pressure fails and the pumps run continually . I need to buy another since it is not under warranty any longer and not sure which brand to buy also I am looking into installing it in the tank this time . Any suggestions to why it might be failing and how are you guys mounting your holley fuel pumps ?
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