OT F150

avant 1735 · Apr 17, 2018

Please excuse my posting, but I have posted a few issues concerning pick-ups and have always received help. My son has a 2001 F150, about a year ago it started acting up, would not start, could not hear the fuel pumps high pitch wine. So I changed the fuel pump. All was well. Then about 2 months ago it started doing the same thing, so I changed the fuel pump out and the fuel pump relay. All seemed to be ok. Then after a dozen or so starts it goes back to the original problem, it won't start. Has anyone ever had this problem? Any thoughts or recommendations would be greatly appreciated.

Gambles · Apr 17, 2018

Two questions from the peanut gallery....
What brand of fuel pump are you replacing it with? A "good" brand or a Chinese-built with a lifetime warranty?
How do your electrical connections, including all grounds, look?

jimg.allentown · Apr 17, 2018

When the same problems keep recurring, there is something wrong (besides or in addition to) the problem you are repairing. Something has to be CAUSING the problem.

Possibility: when you replace the pump, are you also "disturbing" the grounding? In other words, disturbing it just enough to make a ground for a short time and then failing again?

Possibility: Could there be a problem in the wiring at the pump connector? Like a broken conductor inside the insulation? When you disturb it to replace the pump, you make a connection that only lasts for a short time.

Diagnostics and testing are in order here. Are you testing the pump that has appeared to have failed? Try powering it directly from the battery. If it runs, it is not failed. It is very unlikely that more than one pump in a row is bad. Something else is causing it to fail.

Could it be something in the fuel? There are additives that may be contained in fuels that could contribute to the problem. Time for some in depth investigation.

UncleTom · Apr 17, 2018

And what was the fuel preasure?

ptfarmer · Apr 17, 2018

Are you are getting the fuel pumps that are from Airtex, if so get a different brand of pump. Airtex parts are not that good (especially their fuel pumps).

Carls70 · Apr 18, 2018

Have you checked the inertia switch & related wiring? I have have several act up on me over the years... Just a thought.

My Uncle & Grandfather (both of whom retired from the St Paul Ford plant) swore that the pumps would have issues if consistently run below 1/4 tank. Not sure if that holds true for the current pumps but I have experienced issues with the 80s & 90s pumps.

I have seen issues with new aftermarket pumps failed right out of the box and in one case a new pump was seized.

Carl

W_B · Apr 18, 2018

I had two aftermarket starters on a Ford Ranger fail in a very short time. Got a genuine (and expensive) Ford part from the dealer and never any more trouble.

OT F150

avant 1735

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Gambles

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jimg.allentown

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UncleTom

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ptfarmer

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Carls70

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W_B

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