6.9 timing issues??
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6.9 timing issues??
My 6.9 runs flawlessly at lower RPM's and cuts out at higher RPM's. I have been told this sounds like a timing problem and that makes sense because I made use of the little bit of play in the mount of the injector pump and turned it the little bit possible to the right it ran a little better and smoked less and when I turned it to the left it ran worse and smoked more.
Now if this was a gas engine operating the way it does I would say the timing is on but the advance is off.
Is there any kind of advance system in a diesel, or is there some kind of curve built into the injector pump timing?
Also, around the time it started missing more I had made some exhaust improvements, which I am guessing increased the negative impact of the lean condition caused by the timing being off. I am going to be heading out of town with it in the morning, and I am guessing that putting part of the old exhaust back on until I can get the timing looked at would only mask the problem, as in it might run more smoothy but it will still be operating very inefficiently and will probably get crappy mileage? I have had it for a year but have never taken it more than 80 miles from home and that was only once.
Any input on any of these items would be greatly appreciated!!!
Now if this was a gas engine operating the way it does I would say the timing is on but the advance is off.
Is there any kind of advance system in a diesel, or is there some kind of curve built into the injector pump timing?
Also, around the time it started missing more I had made some exhaust improvements, which I am guessing increased the negative impact of the lean condition caused by the timing being off. I am going to be heading out of town with it in the morning, and I am guessing that putting part of the old exhaust back on until I can get the timing looked at would only mask the problem, as in it might run more smoothy but it will still be operating very inefficiently and will probably get crappy mileage? I have had it for a year but have never taken it more than 80 miles from home and that was only once.
Any input on any of these items would be greatly appreciated!!!
More Turbo
Joined: Mar 2012
Posts: 515
Likes: 8
How old are your injectors and pump? How many miles are on them? Original pump/injectors should have paint on them.
As far as timing the pump, static timing is set by matching the lines on the pump and the housing. But since all pumps are different, I think it's near to statically time a new pump and get it spot on though you can get it close with a good ear. Dynamic timing is set with the engine running at 2000 rpm (iirc), but I had mine set by a shop who still had the right meter. There is a timing advance solenoid on the pump, which is energized for a few minutes while the engine is warming up.
As far as timing the pump, static timing is set by matching the lines on the pump and the housing. But since all pumps are different, I think it's near to statically time a new pump and get it spot on though you can get it close with a good ear. Dynamic timing is set with the engine running at 2000 rpm (iirc), but I had mine set by a shop who still had the right meter. There is a timing advance solenoid on the pump, which is energized for a few minutes while the engine is warming up.
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How old are your injectors and pump? How many miles are on them? Original pump/injectors should have paint on them.
As far as timing the pump, static timing is set by matching the lines on the pump and the housing. But since all pumps are different, I think it's near to statically time a new pump and get it spot on though you can get it close with a good ear. Dynamic timing is set with the engine running at 2000 rpm (iirc), but I had mine set by a shop who still had the right meter. There is a timing advance solenoid on the pump, which is energized for a few minutes while the engine is warming up.
As far as timing the pump, static timing is set by matching the lines on the pump and the housing. But since all pumps are different, I think it's near to statically time a new pump and get it spot on though you can get it close with a good ear. Dynamic timing is set with the engine running at 2000 rpm (iirc), but I had mine set by a shop who still had the right meter. There is a timing advance solenoid on the pump, which is energized for a few minutes while the engine is warming up.
The truck has 99k, but it's pretty much all city.
The timing advance solenoid - I am guessing that is what keeps the idle speed a little higher when cold? Is there a resource for attempting to adjust that without the proper equipment? I guess I can google it.
Thread Starter
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New User
Joined: Oct 2013
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How old are your injectors and pump? How many miles are on them? Original pump/injectors should have paint on them.
As far as timing the pump, static timing is set by matching the lines on the pump and the housing. But since all pumps are different, I think it's near to statically time a new pump and get it spot on though you can get it close with a good ear. Dynamic timing is set with the engine running at 2000 rpm (iirc), but I had mine set by a shop who still had the right meter. There is a timing advance solenoid on the pump, which is energized for a few minutes while the engine is warming up.
As far as timing the pump, static timing is set by matching the lines on the pump and the housing. But since all pumps are different, I think it's near to statically time a new pump and get it spot on though you can get it close with a good ear. Dynamic timing is set with the engine running at 2000 rpm (iirc), but I had mine set by a shop who still had the right meter. There is a timing advance solenoid on the pump, which is energized for a few minutes while the engine is warming up.
Lead Driver
Joined: Apr 2008
Posts: 6,945
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Im willing to bet youre due for a new pump. 100k is the Ford recommended service date for pump and injectors (actually inspection is every 60k) its 20+ years old and 100k id just bite the bullet and get a pump / injectors and have it timed by a reputable diesel shop, if you cant find one with the meter, an agriculture shop should have the stuff.
More Turbo
Joined: Mar 2012
Posts: 515
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There is no paint on the injector pump, unless the goldish finish is a paint? I will have to take a better look at that. That is about the same color as the injectors.
The truck has 99k, but it's pretty much all city.
The timing advance solenoid - I am guessing that is what keeps the idle speed a little higher when cold? Is there a resource for attempting to adjust that without the proper equipment? I guess I can google it.
The truck has 99k, but it's pretty much all city.
The timing advance solenoid - I am guessing that is what keeps the idle speed a little higher when cold? Is there a resource for attempting to adjust that without the proper equipment? I guess I can google it.
The thing that keeps the idle speed higher is the cold idle advance... It's on the side of the pump that the throttle cable connects to, and is the little arm that comes out. You can adjust your idle with the screw on that side, and should be able to adjust the cold idle speed by moving the bracket that the advance is mounted on.
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Unfortunately I don't even almost have the money for all that stuff so if it needs it I will just have to park it for a while.
I will see what I can figure out. Thanks guys!
I will see what I can figure out. Thanks guys!
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I wish I would have bought new tabs for my '84 6 cylinder F150 convertible today instead of the diesel!
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