Rig has been running great, now there seems to be an issue with the injection pump. Searches turned up nothing but if you know of a link that may help I would be grateful
1982 3B, edic has been removed, replaced with a manual glow plug control and a shutdown cable. Cable sits right where the edic control rod was in the run position. Removing the cable end doesn't change whats happening with the engine.
1. Started hearing loud ticking at all speeds. Sounds like a valve tick but adjusted the valves and no change.
2. Constant pulsation in #1 and #2 fuel lines when you touch them while running. Can also be felt in the soft line off the stock fuel filter that feeds the injection pump. Lines have been bled and I am not finding additional air.
Injectors were pulled and pop tested and they were all good around 1700psi with a good pattern. Switching them around made no change in the pulsation of #1 and #2 fuel lines.
3. What sounds like gears meshing (sort of like a whirring sound?)can now be heard while driving down the road. Not coming from the gear boxes! Gets louder and faster when you step on the pedal with the gearbox in nuetral. Never did this before. Definately coming from the left side of the engine.
4. Rig idles and accelerates as always. No change in fuel consumption. No black, blue or white smoke at any time with the exception of high rpm on a hill in 3rd, a bit of black but I would expect that.
5. Diaphram is OK. Pull the line and the idle takes off. Also holds vacuum with my hand pump.
6. Fuel filters have been changed. No change to symptoms.
7. Air has been bled from filter screw, injection pump and injectors several times. No additional air found with follow up bleeding.
8. Rubber section of Fuel return hose has been changed and tightened.
9. And I have never messed with the timing of the pump. Nor have I moved the fuel control screw.
The only thing that seems to eliminate all the new sounds, ticking and the gears meshing sound, is while down shifting. Letting the rig coast down hill with the rig in gear all the sounds go away as the rig slows down. Step on the clutch and the sounds come right back.
Any ideas? Suggestions? What am I missing? Thanks
Tony
1982 3B, edic has been removed, replaced with a manual glow plug control and a shutdown cable. Cable sits right where the edic control rod was in the run position. Removing the cable end doesn't change whats happening with the engine.
1. Started hearing loud ticking at all speeds. Sounds like a valve tick but adjusted the valves and no change.
2. Constant pulsation in #1 and #2 fuel lines when you touch them while running. Can also be felt in the soft line off the stock fuel filter that feeds the injection pump. Lines have been bled and I am not finding additional air.
Injectors were pulled and pop tested and they were all good around 1700psi with a good pattern. Switching them around made no change in the pulsation of #1 and #2 fuel lines.
3. What sounds like gears meshing (sort of like a whirring sound?)can now be heard while driving down the road. Not coming from the gear boxes! Gets louder and faster when you step on the pedal with the gearbox in nuetral. Never did this before. Definately coming from the left side of the engine.
4. Rig idles and accelerates as always. No change in fuel consumption. No black, blue or white smoke at any time with the exception of high rpm on a hill in 3rd, a bit of black but I would expect that.
5. Diaphram is OK. Pull the line and the idle takes off. Also holds vacuum with my hand pump.
6. Fuel filters have been changed. No change to symptoms.
7. Air has been bled from filter screw, injection pump and injectors several times. No additional air found with follow up bleeding.
8. Rubber section of Fuel return hose has been changed and tightened.
9. And I have never messed with the timing of the pump. Nor have I moved the fuel control screw.
The only thing that seems to eliminate all the new sounds, ticking and the gears meshing sound, is while down shifting. Letting the rig coast down hill with the rig in gear all the sounds go away as the rig slows down. Step on the clutch and the sounds come right back.
Any ideas? Suggestions? What am I missing? Thanks
Tony
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