Low fuel pressure warning
Mountain Pass
Joined: Apr 2017
Posts: 102
Likes: 15
I would not use the Power Service Diesel 911 either based on what the dealer told me, but they also said the Power Service Diesel Fuel Supplement +cetane boost (white bottle, not red) is a very different product and fine for the 6.7 diesel engines. Of course, I am taking their word for it and not pushing the product. It seems to have worked for me in this situation and I don't plan on using it again once heading back south.
Elder User
Joined: Jun 2017
Posts: 685
Likes: 4
Whatever fuel additives you use be sure that they have demulsifiers to allow the water separator to do it's job. Emulsifiers suspend water in the fuel as tiny droplets and allows it to pass through the entire fuel system. I believe that Ford recommends only additives that contain demulsifiers.
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Hotshot
Joined: Apr 2013
Posts: 10,119
Likes: 652
From: NH
We don’t normally have sustained sub zero temps where I live. Never had to use it. But if the temps drop below zero, I think it’s worth it.
Tuned
Joined: Sep 2017
Posts: 298
Likes: 2
Thanks. I should be fine but will keep it in mind if in a colder area.
Junior User
Joined: Jan 2017
Posts: 97
Likes: 2
Exact thing happens to me. Not enough anti gel. Dealer warmed it up overnight and changed out the filters. Got the same warning low pressure. They make a anti gel called 911 that works great but still change out the filters. I carry that with me all the time now
Logistics Pro
Joined: Dec 2004
Posts: 3,541
Likes: 5
From: Weatherford Texas.
Read above about 911 Don't use it in 6.7
Mountain Pass
Joined: Apr 2017
Posts: 102
Likes: 15
For those of you suggesting a fuel filter change, do you also suggest the water filter be changed as well? I see they sell a kit (FD4625) that includes both.
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More Turbo
Joined: Aug 2009
Posts: 551
Likes: 19
The anti-gel only works when the fuel is above the cloud point, usually around 32F, so if one is buying fuel from an above ground tank its at ambient temp. If you are lucky enough to have a heated garage for your truck the additive will then blend to keep fuel from gelling.
If traveling and the low fuel pressure light illuminates an option is to let it idle as the return fuel will eventually warm the lower fuel filter.
If traveling and the low fuel pressure light illuminates an option is to let it idle as the return fuel will eventually warm the lower fuel filter.
Super Moderator
Joined: Aug 2008
Posts: 37,379
Likes: 1,863
From: Frederick, MD
Fuel filters are sold in a pair. You have two, always change in pairs.
Never use 911.
I use the ford anti gel for sustained temps below 20F.
Carry a spare set of filters. Weather you want to or not, if you are somewhere that you get the gelling, you can always change them out. May not be pleasant, but you will be able to continue on your way.
Never use 911.
I use the ford anti gel for sustained temps below 20F.
Carry a spare set of filters. Weather you want to or not, if you are somewhere that you get the gelling, you can always change them out. May not be pleasant, but you will be able to continue on your way.
Cargo Master
Joined: Aug 2002
Posts: 2,117
Likes: 8
From: Over Yonder, MN
I'll just add that the other night it was -15, and though I never received any warnings, my truck was downshifting on hills it never would have before. I do keep an extra set of filters in the truck though, I've found that once they clog from wax, they never really fully recover and should just be replaced.
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Hotshot
Joined: Apr 2013
Posts: 10,119
Likes: 652
From: NH
The dealer has my filters in I ordered yesterday; I'll be changing the filters tonight. Truck was plugged in all night (-11F this AM) and started OK, but once again had very little power going up hills. I don't work the throttle hard when the engine is this cold, maybe it's characteristic. Transmission was staying in low gears a long time, but that is probably a warm-up strategy.
When you change out the filter on the frame (on a 2017) how does the fuel stop flowing from the tank? My fuel tank is nearly full.
My understanding is you drain the entire housing, then unbolt the bottom and pull the filter out. Clean the housing, install new o-ring seal, install new filter, reinstall and tighten bolts. Then do underhood filter which is easier I guess (nothing to drain). Then do the air purge procedure by turning key on / off 6 times?
When you change out the filter on the frame (on a 2017) how does the fuel stop flowing from the tank? My fuel tank is nearly full.
My understanding is you drain the entire housing, then unbolt the bottom and pull the filter out. Clean the housing, install new o-ring seal, install new filter, reinstall and tighten bolts. Then do underhood filter which is easier I guess (nothing to drain). Then do the air purge procedure by turning key on / off 6 times?
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Hotshot
Joined: Apr 2013
Posts: 10,119
Likes: 652
From: NH
Thanks senix. The 2017 trucks have a rectangular filter housing instead of the bowl design that unscrewed as the 2011-2016 trucks have.
Senior User
Joined: Jan 2017
Posts: 275
Likes: 2
From: Nebraska
The dealer has my filters in I ordered yesterday; I'll be changing the filters tonight. Truck was plugged in all night (-11F this AM) and started OK, but once again had very little power going up hills. I don't work the throttle hard when the engine is this cold, maybe it's characteristic. Transmission was staying in low gears a long time, but that is probably a warm-up strategy.
When you change out the filter on the frame (on a 2017) how does the fuel stop flowing from the tank? My fuel tank is nearly full.
My understanding is you drain the entire housing, then unbolt the bottom and pull the filter out. Clean the housing, install new o-ring seal, install new filter, reinstall and tighten bolts. Then do underhood filter which is easier I guess (nothing to drain). Then do the air purge procedure by turning key on / off 6 times?
When you change out the filter on the frame (on a 2017) how does the fuel stop flowing from the tank? My fuel tank is nearly full.
My understanding is you drain the entire housing, then unbolt the bottom and pull the filter out. Clean the housing, install new o-ring seal, install new filter, reinstall and tighten bolts. Then do underhood filter which is easier I guess (nothing to drain). Then do the air purge procedure by turning key on / off 6 times?
If you have a later build date, i dont know when they fixed this, you have a check valve installed and it will stop draining.
If you have the early model you have to pull the middle line on top of your tank to get the fuel to stop draining. Then you can change them as normal.
Its gonna suck if you dont have a heated work area to do this.