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Old 02-19-2018, 10:02 AM   #5
Lapister
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Join Date: Dec 2014
Location: Pasadena
Posts: 261
48 psi does sound low if you are supposed have 55. Did you leave the FP tester on after shutting down to see how long it holds pressure? If it goes to 0 after key off you likely have a bad check valve integrated into the FP. Check Filter? Also if later than 02 model year the filter is part of the FP.
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