Injector pump problems
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Joined: Oct 2010
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Injector pump problems
I have a 1989 7.3L E350 van and having problems bleeding the lines.
I replaced the Injector pump this spring and got my rig running. Ran it to town once to check it all out and then parked it for the summer.
Last week I tried to start it no luck. I have checked it out and cannot figure what is happening.
I replaced the fuel filter (filling it with diesel)
I have 12 v to the cold start and shut off
When I crack the nut loose on the line at the intake to the injector pump i am getting fuel out when I crank it over.
There is a trickle of diesel coming out of the injector pump return line (I have a clear fuel line here so I can see it trickling through)
Any thoughts?
I really would hope there is something more to do than pull this new rebuild injector pump off and send it back.
I replaced the Injector pump this spring and got my rig running. Ran it to town once to check it all out and then parked it for the summer.
Last week I tried to start it no luck. I have checked it out and cannot figure what is happening.
I replaced the fuel filter (filling it with diesel)
I have 12 v to the cold start and shut off
When I crack the nut loose on the line at the intake to the injector pump i am getting fuel out when I crank it over.
There is a trickle of diesel coming out of the injector pump return line (I have a clear fuel line here so I can see it trickling through)
Any thoughts?
I really would hope there is something more to do than pull this new rebuild injector pump off and send it back.
Posting Guru
Joined: Oct 2005
Posts: 1,030
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From: Powell River B.C.
When the injector lines are all cracked and your cranking it over, the fuel lever needs to be in the wide open postion to effectively and quickly bleed the lines. just a thought, also make sure the power is getting through to the fuel shut off soliniod, maybe a loose or corroded connection not allowing enough voltage open the soliniod?
Posting Guru
Joined: Feb 2010
Posts: 2,006
Likes: 2
From: CASA GRANDE AZ
there should be a check ball or rubber check valve on the fuel filter header and the line should go to the return , it will pump air and wont start . on mine i just blocked it off .
i dont think that part is available any more !
i dont think that part is available any more !
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Thanks all I have tried all of this. I have good contact to the shut off, I have blocked the return line. I have fuel coming from the lift pump.
I fear that i might have a stuck metering valve in the injector pump.
Anyone ever opened up an injector pump and tried to fix one?
I fear that i might have a stuck metering valve in the injector pump.
Anyone ever opened up an injector pump and tried to fix one?
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Methanoholic
Joined: Mar 2009
Posts: 6,442
Likes: 8
From: Maine (NorCal Native)
The return system is a critical component of these motors, you cannot just block them off ... Best thing you can do is return the Fuel Return system to a properly working condition and layout.
At the Schrader valve on the filter head you have 1/3 pint in 10 seconds of cranking at 4-7psi ???
If internals of the IP are frozen the best thing you can do is Fill the IP full of Stanadyne Lubricity Formula and let it soak for a day or two.
You can pull it apart, however do not do so with out a manual, improper assembly could cause a run away motor ... Kaboom!
-Enjoy
fh : )_~
At the Schrader valve on the filter head you have 1/3 pint in 10 seconds of cranking at 4-7psi ???
If internals of the IP are frozen the best thing you can do is Fill the IP full of Stanadyne Lubricity Formula and let it soak for a day or two.
You can pull it apart, however do not do so with out a manual, improper assembly could cause a run away motor ... Kaboom!
-Enjoy
fh : )_~
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Posting Guru
Joined: Feb 2010
Posts: 2,006
Likes: 2
From: CASA GRANDE AZ
hey festus on my truck that check valve or what ever the proper name is on the filter header was shot and ford told me that it is not available at least were i am at . that is on the 7.3 idi , my old 6.9 was completely different . and if one chooses to run different style of filters then all that garbage would be eliminated . on all of the other diesels that i have
from tractors to drill riggs , compressors , power supplies , none has that type of filter head on them . and they all have the rotary pump
from tractors to drill riggs , compressors , power supplies , none has that type of filter head on them . and they all have the rotary pump
Methanoholic
Joined: Mar 2009
Posts: 6,442
Likes: 8
From: Maine (NorCal Native)
We are talking about the International (Navistar) IDI motor in Ford trucks, not a farm tractor, drill rig compressor or whatever else!
If one chooses to eliminate the return system then one deserves the headache it creates ...
haplo, To fill the IP with a lubricator, pull the filter, pour it out in a jug or something, fill it with the lubricator, reinstall it ... Crank the motor for about 10 seconds, let it set.
-Enjoy
fh : )_~
If one chooses to eliminate the return system then one deserves the headache it creates ...
haplo, To fill the IP with a lubricator, pull the filter, pour it out in a jug or something, fill it with the lubricator, reinstall it ... Crank the motor for about 10 seconds, let it set.
-Enjoy
fh : )_~
Posting Guru
Joined: Feb 2010
Posts: 2,006
Likes: 2
From: CASA GRANDE AZ
festus chill out since i blocked it off 2 years ago there has been no problems . all the return lines are run to the tank just as they came from ford , just that little valve thing is blocked of
Methanoholic
Joined: Mar 2009
Posts: 6,442
Likes: 8
From: Maine (NorCal Native)
No need to chill ... just pointing out simple facts.
I was not talking about your check valve or whatever, never seen one, I could care less about it.
Plugging off return lines exiting the filter head or IP will cause headaches that are preventable.
-Enjoy
fh : )_~
I was not talking about your check valve or whatever, never seen one, I could care less about it.
Plugging off return lines exiting the filter head or IP will cause headaches that are preventable.
-Enjoy
fh : )_~