6.9 Governor
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Junior User
Joined: Jan 2004
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6.9 Governor
Hello, all.
I've got an '84 F350 that keeps plugging up the check valve at the return line of the injector pump. Brownish black debris that seems really hard. A little carb cleaner has been taking care of it, but it now is starting to idle roughly, and is losing a bit of power. Sound like the governor? (I only recently bought the truck, and have not yet replaced the return lines, which I will be doing shortly.)
If it is the governor, is this something that I can service myself? I don't have the equipment to calibrate pumps, but am no stranger to working on things with tight clearances. I have been looking, but cannot find any info on rebuilding these pumps, or diagrams that would help me figure out if I would have to mess with the calibration to do this.
What do you guys think?
I've got an '84 F350 that keeps plugging up the check valve at the return line of the injector pump. Brownish black debris that seems really hard. A little carb cleaner has been taking care of it, but it now is starting to idle roughly, and is losing a bit of power. Sound like the governor? (I only recently bought the truck, and have not yet replaced the return lines, which I will be doing shortly.)
If it is the governor, is this something that I can service myself? I don't have the equipment to calibrate pumps, but am no stranger to working on things with tight clearances. I have been looking, but cannot find any info on rebuilding these pumps, or diagrams that would help me figure out if I would have to mess with the calibration to do this.
What do you guys think?
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Junior User
Joined: Jan 2004
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That's what I was afraid of. It does sound like the timing is starting to move around on it.
I have read of an all metal flex ring update kit for these pumps. Anybody know where I can get one, and whether or not installing this will disturb the calibration?
Thanks.
I have read of an all metal flex ring update kit for these pumps. Anybody know where I can get one, and whether or not installing this will disturb the calibration?
Thanks.
Post Fiend
Joined: Nov 2004
Posts: 5,638
Likes: 1
From: Manitoba
If the IP is that old a new one is due anyway...... get the injector /return line kit. Consider new injectors too if the ones in it are old.
http://www.mwfi.com/dieselPage/ford_69.htm
http://www.mwfi.com/dieselPage/ford_69.htm
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Junior User
Joined: Jan 2004
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Thanks for the replies.
I was initially considering a new pump, but am looking for a way around it until I can scare up the extra money. It's only been a month since I purchased it, and I've recently put a lot of parts into it, (brakes, shocks, fan clutch, fuel lines, lift pump, fluids, and filters to name a few,) and can't do much more right now.
I did manage to run about 120 gallons of fuel through her before this happened, and the truck was getting about 12 mpg empty with 4.10s and dual wheels. It seemed to have enough power to pull a 5200 pound empty weight trailer with an unknown weight load of logs, (The limiting factor with that one was engine temperature - but that's another story.)
Don't get me wrong - I'm sure that it could be better if I replaced the pump and injectors. I'm just not in a place where I can do this just yet, and am hoping for alternatives as I need my truck. Do you think that I could be damaging the pump by continuing to use it?
Thanks again.
I was initially considering a new pump, but am looking for a way around it until I can scare up the extra money. It's only been a month since I purchased it, and I've recently put a lot of parts into it, (brakes, shocks, fan clutch, fuel lines, lift pump, fluids, and filters to name a few,) and can't do much more right now.
I did manage to run about 120 gallons of fuel through her before this happened, and the truck was getting about 12 mpg empty with 4.10s and dual wheels. It seemed to have enough power to pull a 5200 pound empty weight trailer with an unknown weight load of logs, (The limiting factor with that one was engine temperature - but that's another story.)
Don't get me wrong - I'm sure that it could be better if I replaced the pump and injectors. I'm just not in a place where I can do this just yet, and am hoping for alternatives as I need my truck. Do you think that I could be damaging the pump by continuing to use it?
Thanks again.
Junior User
Joined: Oct 2005
Posts: 74
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From: Prince george, B.C.
the pump is probably damaged already and after you take the pump completely apart to replace the governor ring you will have to recallibrate
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Junior User
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Bummer. Guess I'll have to start looking for pricing on recalibration, and take it from there. Looks like I can get a rebuild kit with the flex ring included for under $30 including shipping, but the rebuilder selling it to me says no calibration necessary with governor ring replacement. 
Is he for real, or should I be looking for another supplier?
Thanks guys!
Is he for real, or should I be looking for another supplier?
Thanks guys!
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Post Fiend
Joined: Nov 2003
Posts: 21,285
Likes: 16
From: Nutter Fort, WV
As the ring comes apart, the timing will start moving more and more while you drive.
I would worry about it advancing to far while pulling a load.
If the injector fires to far before TDC, the stress that would put on the rod and main bearings, rods and pistons could get expensive.
Basically you would be starting the power stroke while the piston was going up, which is not a good thing.
When the timing is to advanced, you hear a rattle that sounds like a Power Stroke engine or detonation (spark knock) on a gasoline engine.
When it retards to far, the power goes away.
As far as the seller goes, he wants to sell you something.
If I had my IP apart, I would want to make sure everything was put back i right and everything was calibrated correctly.
Depending on what is not right, when you start the engine it may be a run away.
When that happens you either have to cut a fuel line or shut off the air before the engine revs high enough to blow.
Given the amount of fuel in the IP, even cutting the fuel line may not stop it in time.
I would worry about it advancing to far while pulling a load.
If the injector fires to far before TDC, the stress that would put on the rod and main bearings, rods and pistons could get expensive.
Basically you would be starting the power stroke while the piston was going up, which is not a good thing.
When the timing is to advanced, you hear a rattle that sounds like a Power Stroke engine or detonation (spark knock) on a gasoline engine.
When it retards to far, the power goes away.
As far as the seller goes, he wants to sell you something.
If I had my IP apart, I would want to make sure everything was put back i right and everything was calibrated correctly.
Depending on what is not right, when you start the engine it may be a run away.
When that happens you either have to cut a fuel line or shut off the air before the engine revs high enough to blow.
Given the amount of fuel in the IP, even cutting the fuel line may not stop it in time.
Posting Guru
Joined: Oct 2005
Posts: 1,030
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From: Powell River B.C.
I have gone both routes with the IP. I bought a rebuilt from Diesel Care and Perfromance on e-bay for 275 dollars, paid the core charge and kept my original pump, as it was working OK just the housing seals were leaking, 250K km. The diesel care pump has been on for a year and a half with no problems, I bought the seal kit for my old pump, installed all new seals, found no other damage or worn parts. I will still try to have my resealed pump test run on a calibration stand before I would install it on the truck. It is not easy to find a shop with the right equipment that is willing to put a pump on their stand that they didn't rebuild FWIW. The newer IP governor retainer is all metal, I didn't find anything that you could call a flex ring in the pump or the "rebuild kit" that would be changeable in my 93 IP (DB2-5013).
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Junior User
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Okay, thanks everybody.
Looks like maybe I'll have to go with a replacement IP, then, (especially since I got a check yesterday that I wasn't expecting - ah, the ups and downs of self employment...)
Luckily , I elected to not drive the truck until I got some answers on the safety of doing so. I can't hear anything that sounds bad when I am driving the truck, only roughness at idle, but I could have been missing something over the road noise. I've gotten my hands on a loaner truck for the next week - not much good for pulling loads, but it'll maintain my presence and allow me to do some work at the job site.
Guess I'll have to settle on a vendor now. Given the fact that I have no service history for the truck and considering my previous fuel consumption, I have no idea whether or not to spring for injectors. What do you guys think?
Looks like maybe I'll have to go with a replacement IP, then, (especially since I got a check yesterday that I wasn't expecting - ah, the ups and downs of self employment...)
Luckily , I elected to not drive the truck until I got some answers on the safety of doing so. I can't hear anything that sounds bad when I am driving the truck, only roughness at idle, but I could have been missing something over the road noise. I've gotten my hands on a loaner truck for the next week - not much good for pulling loads, but it'll maintain my presence and allow me to do some work at the job site.
Guess I'll have to settle on a vendor now. Given the fact that I have no service history for the truck and considering my previous fuel consumption, I have no idea whether or not to spring for injectors. What do you guys think?
Post Fiend
Joined: Nov 2003
Posts: 21,285
Likes: 16
From: Nutter Fort, WV
The only thing I can say there is the best combination is replace both the IP and injectors at the same time.
Since it sounds like you have IP problems, that would have to take first priority.
Since it sounds like you have IP problems, that would have to take first priority.
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Junior User
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Yep, definitely first priority on the IP. I've gotta put new brakes on my trailer too, I just got in from checking the magnets, and all six are shot. Guess it depends on how far I can stretch things as to whether I go with the injectors right now or not. Also, I would like to be able to install a turbo down the road, and would most likely need different injectors at that point, (I'm guessing.) Would I then have to have the fuel curve adjusted on the IP, or can I simply compensate with the timing and fuel screw? I guess it doesn't really matter right now as I need to get back on the road first and foremost - just trying to think ahead is all.
Diesel Care seems to have the best price on the IP, and KJLYPW seems to have had a good experience with them. Anybody else dealt with these guys?
Thanks again.
Diesel Care seems to have the best price on the IP, and KJLYPW seems to have had a good experience with them. Anybody else dealt with these guys?
Thanks again.
Posting Guru
Joined: Oct 2005
Posts: 1,030
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From: Powell River B.C.
I've had good luck, others have not. If you do have a problem they are good about making it right, just a matter of how much time you have to deal with a problem, should you have one. On the other hand you can't beat their pricing! FWIW. From the other posts I've read on this and other sites, there is no sure bet on buying a flawless IP from any of the vendors! Check out their warranty policy, speed of service, and ability to get ahold of if need be before deciding.
