Good Sam Club Open Roads Forum: Where did the Gas go ?
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 > Where did the Gas go ?

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MrWizard

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Posted: 04/22/20 04:25am Link  |  Quote  |  Print  |  Notify Moderator

Apparently there is a clog in the fuel pickup in the tank and or the In Tank Pump has finally gone to pieces,
Last year I installed an external inline pump on the frame
Right now little too no fuel is reaching this pump,
In a bid to move the RV to another location close by, I connected the input of this external pump to a gas can "hillbilly style", And pulled the power fuse of the OEM in the tank pump
It started and ran, but it pumped 3 gallons of gas from the can in a few minutes, going less than one mile,
No fuel was spilled, No external leaks, No fuel on the frame, or the engine, or the ground/street, No fumes, No smell,

Is it possible the fuel somehow went thru the return
lines into the tank ?
Or
Maybe dumped into the engine by a blown open injector ?

1996 Ford 460, F53 RV chassis

* This post was edited 04/22/20 11:18am by MrWizard *


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georgelesley

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Posted: 04/22/20 04:49am Link  |  Quote  |  Print  |  Notify Moderator

If the engine ran normally I would say the return line took it to the tank. That is what happens normally when excess fuel is provided by the fuel pump. Somewhere in the fuel injection system probably near the end of the fuel rails there will be a pressure regulator that directs the fuel in excess of what the injectors are demanding back to the main tank.


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midnightsadie

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Posted: 04/22/20 05:05am Link  |  Quote  |  Print  |  Notify Moderator

X2 but i,d check the oil level.

Bruce Brown

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Posted: 04/22/20 05:05am Link  |  Quote  |  Print  |  Notify Moderator

I'm thinking return line or back fed through the in-tank pump.


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dodge guy

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Posted: 04/22/20 05:27am Link  |  Quote  |  Print  |  Notify Moderator

A 96 Ford is a return system. So yes it got pumped back to the tank. Time to fix it properly. Install a new intake pump with a new pickup. And a new filter.


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wa8yxm

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Posted: 04/22/20 07:01am Link  |  Quote  |  Print  |  Notify Moderator

midnightsadie wrote:

X2 but i,d check the oil level.

DItto on that

If you have an older engine with a cam driven fuel pump. and the diaphragm on the pump gets religion (Becomes holy. ok holey) the gas goes into the oil pan.


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wildmanbaker

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Posted: 04/22/20 08:56am Link  |  Quote  |  Print  |  Notify Moderator

Pretty sure the 96 is a multi-port fuel injection system, and uses an high pressure in tank fuel pump. Still, check the oil just for grins and giggles.


Wildmanbaker


RLS7201

Beautyful Downtown Gladstone, MO

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Posted: 04/22/20 11:17am Link  |  Quote  |  Print  |  Notify Moderator

On you old in tank fuel pump is a sock that is probably choked with junk from the tank.
On the left side fuel rail is the fuel pressure regulator that sent the excess fuel back to the OEM tank.

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MrWizard

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Posted: 04/22/20 12:08pm Link  |  Quote  |  Print  |  Notify Moderator

I'm cashed strapped , don't have a $1000 too drop the 70+ gallon tank and install a new in tank pump
( there goes the stimulus check , IF it ever arrives )

I'm going to try blowing compressed air back thru the main fuel line,
I might even try a test, connecting to The generator pickup tube,
My biggest priority until now, was to get airlifts installed at the drive axle

MrWizard

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Posted: 04/22/20 12:19pm Link  |  Quote  |  Print  |  Notify Moderator

New fuel pressure regulator Spring 2019,
Before I installed the external fuel pump,
At least that seems to be doing its job

I did not know the fuel return was connected at the pressure regulator,
The chassis manual I have does not make that clear,
At least for me, with my lack of experience with these systems,
It does not show the system as a diagram,
It has drawings of component locations
You have to already know how it works, and what you are looking for and looking at,
Really appreciate the help I get here

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