No Profanity *** No Flaming *** No Advertising *** No Anti Trappers *** No Politics
No Non-Target Catches *** No Links to Anti-trapping Sites *** No Avoiding Profanity Filter


Home~Trap Talk~ADC Forum~Trap Shed~Wilderness Trapping~International Trappers~Fur Handling

Auction Forum~Trapper Tips~Links~Gallery~Basic Sets~Convention Calendar~Chat~ Trap Collecting Forum

Trapper's Humor~Strictly Trapping~Fur Buyers Directory~Mugshots~Fur Sale Directory~Wildcrafting~The Pen and Quill

Trapper's Tales~Words From The Past~Legends~Archives~Kids Forum~Lure Formulators Forum~ Fermenter's Forum


~~~ Dobbins' Products Catalog ~~~


Minnesota Trapline Products
Please support our sponsor for the Trappers Talk Page - Minnesota Trapline Products


Print Thread
Hop To
F-250 6.7 Powerstroke low fuel pressure #7348579
09/05/21 07:21 PM
09/05/21 07:21 PM
Joined: Mar 2013
Posts: 15,214
Fredonia, PA.
Finster Offline OP
trapper
Finster  Offline OP
trapper

Joined: Mar 2013
Posts: 15,214
Fredonia, PA.
So, switched fuel filters today on my '16 F250 6.7 powerstroke. Took it out for a drive and got low fuel pressure flashing and it threw a code. No need for anyone to try and figure this out. I fixed the problem. I didn't have the frame rail filter housing tight enough and apparently it was sucking air. However, here's my question. The fuel is pressurized in the tank by the pump. It is then sent to the frame rail filter then to the filter on top of the motor . Why, if the rail filter isn't tight enough, is the system sucking air and not spewing out fuel? Doesn't make any sense.

P.S. I HATE MODERN VEHICLES!

Last edited by Finster; 09/05/21 07:25 PM.

I BELIEVE IN MY GOD, MY COUNTRY AND IN MYSELF.
Re: F-250 6.7 Powerstroke low fuel pressure [Re: Finster] #7348687
09/05/21 09:02 PM
09/05/21 09:02 PM
Joined: Mar 2013
Posts: 15,214
Fredonia, PA.
Finster Offline OP
trapper
Finster  Offline OP
trapper

Joined: Mar 2013
Posts: 15,214
Fredonia, PA.
ttt


I BELIEVE IN MY GOD, MY COUNTRY AND IN MYSELF.
Re: F-250 6.7 Powerstroke low fuel pressure [Re: Finster] #7348700
09/05/21 09:19 PM
09/05/21 09:19 PM
Joined: Feb 2014
Posts: 674
western Oklahoma
D
Davisfur Offline
trapper
Davisfur  Offline
trapper
D

Joined: Feb 2014
Posts: 674
western Oklahoma
It's because it doesn't have a pump in the tank. The frame mounted filter is also the in line pump. That filter filters diesel from the tank feeding the pump and then the top filter filters the diesel from the pump to the injection pump. Least that's what they taught in Ford diesel class.

Re: F-250 6.7 Powerstroke low fuel pressure [Re: Finster] #7348726
09/05/21 09:56 PM
09/05/21 09:56 PM
Joined: Aug 2010
Posts: 7,861
Asheville, NC
C
charles Offline
trapper
charles  Offline
trapper
C

Joined: Aug 2010
Posts: 7,861
Asheville, NC
Pressure is from the injector pump on Diesels, isnít it?

Re: F-250 6.7 Powerstroke low fuel pressure [Re: Finster] #7348761
09/05/21 11:03 PM
09/05/21 11:03 PM
Joined: Apr 2007
Posts: 1,929
venango county,pennslyvania
minklessinpa Offline
trapper
minklessinpa  Offline
trapper

Joined: Apr 2007
Posts: 1,929
venango county,pennslyvania
its a ford! they had a better idea!


life member pennslyvania trappers
venango co leader
life member v.f.w.
member nta
member fta
Re: F-250 6.7 Powerstroke low fuel pressure [Re: Finster] #7348774
09/05/21 11:46 PM
09/05/21 11:46 PM
Joined: Jun 2018
Posts: 3,865
Beatrice, NE
L
loosegoose Online content
trapper
loosegoose  Online Content
trapper
L

Joined: Jun 2018
Posts: 3,865
Beatrice, NE
The fuel filter assembly has a pump integrated into it. It's just a "lift pump" that sends fuel to the engine. The engine itself had a system to then pressurize the fuel to a much higher pressure for injection into the cylinder.

Re: F-250 6.7 Powerstroke low fuel pressure [Re: Finster] #7348775
09/05/21 11:48 PM
09/05/21 11:48 PM
Joined: Dec 2013
Posts: 9,836
Greene County,Virginia
R
run Offline
trapper
run  Offline
trapper
R

Joined: Dec 2013
Posts: 9,836
Greene County,Virginia
Modern Diesels tend to be complex.


wanna be goat farmer.
Re: F-250 6.7 Powerstroke low fuel pressure [Re: Finster] #7348805
09/06/21 06:41 AM
09/06/21 06:41 AM
Joined: Dec 2006
Posts: 14,015
Sandhills Nebraska
G
Gary Benson Offline
trapper
Gary Benson  Offline
trapper
G

Joined: Dec 2006
Posts: 14,015
Sandhills Nebraska
It was used too much when it was new.


I know I'm paranoid......but am I paranoid ENOUGH???
Re: F-250 6.7 Powerstroke low fuel pressure [Re: Finster] #7348806
09/06/21 06:42 AM
09/06/21 06:42 AM
Joined: Dec 2008
Posts: 3,168
eastern WV
R
Ridge Runner1960 Offline
trapper
Ridge Runner1960  Offline
trapper
R

Joined: Dec 2008
Posts: 3,168
eastern WV
the lift pump in diesels runs at about 8# pressure, the pump was pulling fuel through the filter, so it was sucking a bit of air, but still moving fuel.
RR

Re: F-250 6.7 Powerstroke low fuel pressure [Re: Davisfur] #7348853
09/06/21 08:37 AM
09/06/21 08:37 AM
Joined: Mar 2013
Posts: 15,214
Fredonia, PA.
Finster Offline OP
trapper
Finster  Offline OP
trapper

Joined: Mar 2013
Posts: 15,214
Fredonia, PA.
Originally Posted by Davisfur
It's because it doesn't have a pump in the tank. The frame mounted filter is also the in line pump. That filter filters diesel from the tank feeding the pump and then the top filter filters the diesel from the pump to the injection pump. Least that's what they taught in Ford diesel class.

Humph! That answers that question. Thanks. It sounded like it was coming from the tank but kind of hard to pinpoint when you are sitting in the cab turning the key and I just assumed it was in the tank since most gas powered cars have it that way.


I BELIEVE IN MY GOD, MY COUNTRY AND IN MYSELF.
Re: F-250 6.7 Powerstroke low fuel pressure [Re: Finster] #7348968
09/06/21 11:36 AM
09/06/21 11:36 AM
Joined: Feb 2014
Posts: 674
western Oklahoma
D
Davisfur Offline
trapper
Davisfur  Offline
trapper
D

Joined: Feb 2014
Posts: 674
western Oklahoma
I understand finster. The sound can be deceiving. I'm pretty sure they told us in school that a electric pump inside a diesel tank was just a bomb waiting for a place to go off but then I'm pretty sure dodge put thiers in the tank so I don't know. I know there is a reason why Ford doesn't put it in the tank like on gas vehicles because in tank is easier for assembly so there must be something to it.

Re: F-250 6.7 Powerstroke low fuel pressure [Re: Davisfur] #7348980
09/06/21 12:00 PM
09/06/21 12:00 PM
Joined: Mar 2013
Posts: 15,214
Fredonia, PA.
Finster Offline OP
trapper
Finster  Offline OP
trapper

Joined: Mar 2013
Posts: 15,214
Fredonia, PA.
Originally Posted by Davisfur
I understand finster. The sound can be deceiving. I'm pretty sure they told us in school that a electric pump inside a diesel tank was just a bomb waiting for a place to go off but then I'm pretty sure dodge put thiers in the tank so I don't know. I know there is a reason why Ford doesn't put it in the tank like on gas vehicles because in tank is easier for assembly so there must be something to it.

Yea, I don't know why they ever started putting pumps in tanks to begin with. It was always a stupid idea as far as I'm concerned. I'm glad mine is on a frame rail. I used to replace fuel pumps on cars at my fathers garage back in the day. I was always a little nerve racking dropping a tank with fumes all over the place. Even if you could siphon most of the fuel out, you never got it all out. Naturally, 9 out of 10 times, the customer had 1/2 to a full tank of gas also. I know a guy who was burned horribly back in high school welding under a car when the tank went up. I saw him decades later and he was still getting skin graphs. He never did look the same obviously.


I BELIEVE IN MY GOD, MY COUNTRY AND IN MYSELF.
Re: F-250 6.7 Powerstroke low fuel pressure [Re: Finster] #7349175
09/06/21 06:03 PM
09/06/21 06:03 PM
Joined: Dec 2006
Posts: 6,051
WA
Vinke Offline
trapper
Vinke  Offline
trapper

Joined: Dec 2006
Posts: 6,051
WA
FASS all the way


Previous Thread
Index
Next Thread