In Tank Fuel Pump
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Post Fiend
Joined: Feb 2006
Posts: 11,892
Likes: 2
From: Middle Tennessee
In Tank Fuel Pump
I've been reading a lot about pre pump and post pump filters etc... Can anyone tell me why ford did not see fit to put the pump in the tank like all other fuel injected engines of the gasoline variety. Is this the industry standard? Does Dodge and GM do the same? Why can't an in tank pump work for diesels? Anyone??? Principals are principals, but does this apply to diesels like gassers? How does our PSD fuel pumps get/maintain a prime from outside the tank on the frame rail and does this invite damage when the prime is lost?
On edit: or is it principle? Never could get that one right.
On edit: or is it principle? Never could get that one right.
Last edited by Tenn01PSD350; Mar 3, 2006 at 01:43 AM.
Elder User
Joined: Jan 2004
Posts: 803
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From: Bobcaygeon Ont.
Actually some of the gassers have 2 pumps.My 89 150 had a low pressure pump in the tank and a high pressure pump on the frame. As for why the diesels don't have this i don't have a clue. It would make sense to me but hey i don't work for ford!
Fleet Owner
Joined: Jun 2004
Posts: 25,090
Likes: 1,112
From: Rio Rico, AZ.
Originally Posted by Tenn01PSD350
I've been reading a lot about pre pump and post pump filters etc... Can anyone tell me why ford did not see fit to put the pump in the tank like all other fuel injected engines of the gasoline variety. Is this the industry standard? Does Dodge and GM do the same? Why can't an in tank pump work for diesels? Anyone??? Principals are principals, but does this apply to diesels like gassers? How does our PSD fuel pumps get/maintain a prime from outside the tank on the frame rail and does this invite damage when the prime is lost?
On edit: or is it principle? Never could get that one right.
On edit: or is it principle? Never could get that one right.
You are right, the laws of nature never change.
Post Fiend
Joined: Jul 2005
Posts: 14,582
Likes: 12
From: 21791
i do believe some trucks (duramax) have a lift pump in the tank to push fuel to the primary pump. however i am not sure. i think the reason we only need one pump is because the tank is mounted at the same height or even above the fuel pump (depending on how full tank is) and it doesn't need to lift it far at all, if any.
Lead Driver
Joined: Oct 2004
Posts: 7,413
Likes: 1
From: Columbia, MO
I think strokin's right on how our pumps maintain prime, as it's most of the time at or below the fuel level. But, I've often wondered too why the pumps aren't in-tank. I don't mind so much, as they are easier to change not in the tank.
Oh, and it's principle. A Principal is a person. Remember it by the "pal" at the end, since the person could be your "pal" although if you're like me, more often than not, he wasn't your pal.
Oh, and it's principle. A Principal is a person. Remember it by the "pal" at the end, since the person could be your "pal" although if you're like me, more often than not, he wasn't your pal.
Elder User
Joined: Jul 2005
Posts: 716
Likes: 0
From: memphis
How would you do a pre-pump filter?
Diesel has alot more problems with water crude,
that gets filtered out. My mixer chamber inside
the tank was almost completely stopped up with
some type grey goop. I like the 5minute prepump
filter change better than dropping the tank.
Diesel has alot more problems with water crude,
that gets filtered out. My mixer chamber inside
the tank was almost completely stopped up with
some type grey goop. I like the 5minute prepump
filter change better than dropping the tank.
