My fuel pumps I keep putting in my truck in the rear tank are going bad. I have tried motorcraft and airtex fuel pumps, but same problem. Any idea why these pumps are going bad?
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1992 Ford F-250 Question: Fuel pump problem
Answer #1mastertech6371 January 11, 2011, 12:33Master
dirt and debris are the most common reasons for failure. remove the tank and have it completely cleaned out.
Answer #2verdigo from SCE Small Car Enterprises, January 11, 2011, 15:41Enthusiast
Are you sure the pumps are bad? If not you might try powering one up out of the truck. Some times fuel pump relays heat up and work intermittantly.
Answer #3DaveJHM January 12, 2011, 00:30Master
Check your wiring harnesses also. They are known for issues, and even had a TSB for harness pigtail replacement on similar models. Look for damaged connectors and corroded terminals.