troubleshooting fuel supply
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Freshman User
Joined: Sep 2009
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troubleshooting fuel supply
On my 6.9 liter diesel I have fuel at the fuel filter, but
not getting to the injectors. The only thing I can see in between is what I think is called an injector pump. I
recently replaced my rear main seal, and one connection
on my transmission didn't seem to work right. The linkage
that connects to the injector pump seemed to not fit right
..it would go on, but wouldn't shift right so I left it off.
Can this have anything to do with my problems with the
injector pump. If I need to replace the injector pump,
where can I get some instructions so I dont mess up.
not getting to the injectors. The only thing I can see in between is what I think is called an injector pump. I
recently replaced my rear main seal, and one connection
on my transmission didn't seem to work right. The linkage
that connects to the injector pump seemed to not fit right
..it would go on, but wouldn't shift right so I left it off.
Can this have anything to do with my problems with the
injector pump. If I need to replace the injector pump,
where can I get some instructions so I dont mess up.
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Freshman User
Joined: Sep 2009
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When I started having trouble with it, I was driving down the road and it just quit. I thought it
might have been the electric fuel pump and replaced it to find out that it is something else.
After putting in the new electric fuel pump it ran for about 15 miles and quit again at about the
same place it quit the first time. My son poured a small amount of diesel into the air intake
and it cranks and runs till thats gone. There is fuel to the fuel filter. I disconnected the line
coming out and have fuel there.
might have been the electric fuel pump and replaced it to find out that it is something else.
After putting in the new electric fuel pump it ran for about 15 miles and quit again at about the
same place it quit the first time. My son poured a small amount of diesel into the air intake
and it cranks and runs till thats gone. There is fuel to the fuel filter. I disconnected the line
coming out and have fuel there.
Fleet Owner
Joined: Jul 2006
Posts: 20,361
Likes: 822
From: Mi'kma'ki
Gknight,
Daves trying to help you.
but it often takes process of elimination to help.
you should consider answering his questions asked,then he can answer yours much more easily.
Daves trying to help you.
but it often takes process of elimination to help.
you should consider answering his questions asked,then he can answer yours much more easily.
Post Fiend
Joined: Nov 2003
Posts: 21,285
Likes: 15
From: Nutter Fort, WV
Yep, I would go out and buy a 435 dollar injection pump.
And then when the engine dies again, maybe we can figure out where the problem is that could have possibly been fixed for 10 dollars.
I always like to find a problem by changing the most expensive part first.
That way I can be twice as mad when it don't fix the problem.
And then when the engine dies again, maybe we can figure out where the problem is that could have possibly been fixed for 10 dollars.
I always like to find a problem by changing the most expensive part first.
That way I can be twice as mad when it don't fix the problem.
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Freshman User
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fuel supply problems
Dave, No I haven't tried this. If you think there is a way for
air to get into it as I am driving it, after I try bleeding the
pump, where do I look for the air leak culprit. This is the
second time in as many days that this problem has occurred.
The first time, the truck stopped like it ran out of diesel.
We looked it over for a bit and tried cranking it back up and
it did, but ran like it wasn't getting fuel right. I changed the
electric fuel pump and drove it a few miles, got up top 75
mph and it seemed to be ok. The next day I go about 15 miles
in it and it quits and wont start back up for me.
air to get into it as I am driving it, after I try bleeding the
pump, where do I look for the air leak culprit. This is the
second time in as many days that this problem has occurred.
The first time, the truck stopped like it ran out of diesel.
We looked it over for a bit and tried cranking it back up and
it did, but ran like it wasn't getting fuel right. I changed the
electric fuel pump and drove it a few miles, got up top 75
mph and it seemed to be ok. The next day I go about 15 miles
in it and it quits and wont start back up for me.
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Thread Starter
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Freshman User
Joined: Sep 2009
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That seems to be the way it goes for me a lot of the time lately. This is my first diesel.
I will try bleeding a couple of injector lines at the pump and see if that does
anything, but wont mess with it tonight. I'll let you know tomorrow how it turns out. Thanks.
George
I will try bleeding a couple of injector lines at the pump and see if that does
anything, but wont mess with it tonight. I'll let you know tomorrow how it turns out. Thanks.
George
Elder User
Joined: May 2007
Posts: 691
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From: Florida
you might want to check this out seeing as u have an 85....good luck!
New User
Joined: Oct 2008
Posts: 15
Likes: 0
When was the last time you changed the fuel filter? Does it die while driving or coming to a stop when your foot is off the accelerator?
If its the second thing dying while stopping which has happened to my truck. Run a good dose of diesel clean or atf through the system. My govenor was sticking in my injection pump and the diesel treatment cleared it right up.
Lee
If its the second thing dying while stopping which has happened to my truck. Run a good dose of diesel clean or atf through the system. My govenor was sticking in my injection pump and the diesel treatment cleared it right up.
Lee
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Freshman User
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fuel problems
bpainting, It wont crank at this time. It has been a while
since I've changed the fuel filter, but fuel does come
through when disconnecting the flexible line that connects
to the top of the filter connection. I doubt that I have two
thousand miles on the filter. I can get another one though.
Where do you put the auto matic transmission fluid in
the system to clean out the injection pump..maybe pour
some in the new filter?
since I've changed the fuel filter, but fuel does come
through when disconnecting the flexible line that connects
to the top of the filter connection. I doubt that I have two
thousand miles on the filter. I can get another one though.
Where do you put the auto matic transmission fluid in
the system to clean out the injection pump..maybe pour
some in the new filter?
Elder User
Joined: Mar 2008
Posts: 912
Likes: 0
From: Marianna, Florida USA
Where do you have your electric fuel pump mounted in the system? Are you bypassing the mechanical pump? The EP should put a possitive pressure on the system so air cannot get in. My bet is the fuel filter like bpainting suggested. Fill it with diesel kleen, turn your EP on for a couple minutes, bleed the air from your filter and you should be in business.