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Old 02-10-2013, 08:23 AM
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factory fuel pump

My factory fuel pump will drop to 30 psi under heavy throttle with my 155 50 injectors, was thinking about a new oe pump. Should I stick with a ford pump or can I run the delphi or airtex pumps I found online for half the price? obviously the priority is performance. PS I have the blue spring and 6.4 banjo's, the factory pump has 100k miles on it.
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Old 02-10-2013, 08:29 AM
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Re: factory fuel pump

Id stick with the oem pump imo. Ive read Tousley has them for $280shipped. How are you reading fuel psi? What brand gauge?
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Old 02-10-2013, 09:36 AM
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Reading off edge with 0-100 psi gauge plumbed into test port on the filter housing
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Old 02-10-2013, 09:48 AM
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i have a factory pump I am only trying to get $75 out of
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Old 02-10-2013, 09:59 AM
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Quote:
Originally Posted by g2shuck View Post
i have a factory pump I am only trying to get $75 out of
Hope that ain't mine.
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Old 02-10-2013, 10:57 AM
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I recently bought/installed a Carter HFCM with pump and filter for $200 off eBay. Albeit I am on OEM injectors, my PSI had dipped as low as 20 psi shortly after going WFO. After the install, it didn't go below 50 psi, triple digits, WFO.

Be MUCHO CAREFULO with the plastic connectors on the left (aft) side of the HFCM, I broke one. While Auto Zone sells a fuel line disconnector set for right at $20, the one I bought broke on the second line. I could still use it, but the c-clip and spring went flying.
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Old 02-10-2013, 11:02 AM
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karls how much pressure were u making at idle? cause mine still makes like 68, and 65 cruising, just under wfo at high rpm's, like 3500+ it drops hard. Do you guys think a new pump will fix it?
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Old 02-10-2013, 11:04 AM
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When is the last time you did both filters and drained the pump? Also are you 100% your gauge is working correctly being plumbed into the test port?
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Old 02-10-2013, 11:15 AM
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I changed all filters, also I cant think of a better place to measure fuel pressure then the TEST port...where do you have yours plumbed ?
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Old 02-10-2013, 11:16 AM
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Quote:
Originally Posted by borsky4 View Post
karl how much pressure were u making at idle? cause mine still makes like 68, and 65 cruising, just under wfo at high rpm's, like 3500+ it drops hard. Do you guys think a new pump will fix it?
My idle and cruise stayed the same at 60~64 psi with both pumps. But my WFO doesn't go below 50 psi.

Quote:
Originally Posted by white59rt View Post
When is the last time you did both filters and drained the pump? Also are you 100% your gauge is working correctly being plumbed into the test port?
I had never drained mine, and it showed. The Carter pump was silver and the OEM was goldish color. I don't know if the gold was from fuel saturation or being over heated, either way, my psi is where it should be and I'll be opening the water drain EVERY TIME that I change fuel filters. Also reading from the TEST port.

Last edited by Karls03; 02-10-2013 at 11:20 AM.
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