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Old 02-05-2004, 12:57 PM   #5
shadetree
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Join Date: Dec 1999
Location: Knightstown, in, usa
Posts: 2,525
Chico, get a mechanics stethoscope (or a reasonable substitute) and listen near the fuel pump, for that noise. Stock fuel pumps have a knack for breaking the return spring, causing the solid steel pushrod to "knock" at certain rpms'.
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