Low pressure fuel pump issue

3lakesguy · Sep 3, 2013

Looking for advice on plan of action for my low pressure pump.

This past Friday I noticed a whining noise, similar to an electric pump/solenoid. Thought I tracked it to under the hood and assumed it was the wastegate solenoid. Drove about 1800 miles this weekend and the noise continued throughout the weekend. Upon coming home last night I crawled under the truck and found it was the low pressure pump howling at me. It's vibrating enough that you can feel it in the steering wheel.

I read almost a dozen threads on other forums about them (Can't find any threads here). 1 replaced under warranty because he didn't like the noise. 1 died then replaced under warranty. However mostly dead end threads.

The guy who got it warrantied for noise said the dealer initially pulled the fuel bowl to check for trash inside, and following that the noise quit for a short amount of time. So this morning I did the same, and the noise quit for about 30 minutes of run time. ALSO take note that I replaced both fuel filters about 2000 miles ago.

100% of my diesel comes either from my above ground tank where its filtered to 17 microns before pumping it into the truck, or its pumped from that tank, to my L tank then to my truck.

Truck has 87k miles on it, I bought it with 75k.

Attached are two videos. 1 of the key to run, not start and the pump making a bleeding noise, and 1 of the pump while truck is running.

stand by for other video.

12stroker · Sep 10, 2013

Well I can tell you this if its the pump that you think is going out get it replaced.
On my company truck my fuel pump grenaded last year and they had to replace every fuel line and injectors, etc with the fuel system. Thank god it wasn't my truck but the bill was just about 9K it still had warranty.

12stroker · Sep 10, 2013

btw with that video it does sound like its the fuel pump.

Cratos · Sep 11, 2013

have you tried changing your filters just to be safe?

12stroker · Sep 11, 2013

if the fuel pump goes out debris from the pump will still make it threw all the fuel system.

Cratos · Sep 12, 2013

I think that's if the HPFP goes. the LPFP is before the last filter.

12stroker · Sep 12, 2013

Cratos said:
I think that's if the HPFP goes. the LPFP is before the last filter.

Nope it will still take out the whole system. Because that's what went out in my 11 f250.

Cratos · Sep 12, 2013

hum I would think the filters for stop it?

12stroker · Sep 12, 2013

Yeah I thought the same thing but ford told me it still takes out the system. It sucked my truck was in the shop for a month due to parts back ordered.

weekendwarriorfsw32 · Sep 12, 2013

How? Not to call you out but we have had 2 trucks where the LPFP died and one of those came apart but the filters caught everything. Flushed the lines out and did new filters and a pump and its been fore for 6+ months.

dodge_dbag said:
Yeah I thought the same thing but ford told me it still takes out the system. It sucked my truck was in the shop for a month due to parts back ordered.

12stroker · Sep 12, 2013

Well if I can find the paper work ford told me that. They had to pull my cab to replace everything. do you think i would want my truck in the shop that long?
This was the first time I have ever owned a ford and no one had ever had this happen when it did it. Also you couldn't hear the LPFP pump run unless the ford house just replaced evey thing to just do it. That I do not know because it was under warranty.