offroadtruckr
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My LDT 465 engine oil level was rising so I researched the S S posts and read the injection pump TM. Did an oil change, drained 8 gallons of oil/fuel.
I removed the fuel control unit/shut off cover on the fuel injection pump and found pure fuel puddled in the cover. I replaced the #013 o-ring on the fuel control unit shaft and reassembled. It was kind of tricky lining up the plunger pin but I finally did it . I also made sure the fuel control rod moved freely. Started the engine, ran it for a few minutes then removed the cover and didn’t find any fuel but the engine ran differently. The engine seemed to accelerate ok but when letting off the accelerator pedal the rpm’s would drop to about 450-500 and then would rebound back up to normal 700-800.
After driving the truck for about 10 miles I removed the fuel control unit cover and found oil but there didn’t seem to be any fuel mixed in it and the rpm’s were still fluctuating.
Now with the questions.
If the fuel control unit plunger pin is installed wrong how does this affect engine operation?
What causes my engine to act like I am shutting off the fuel then it recovers when letting off the accelerator pedal?
Is it normal to find oil pooled in the fuel shut off cover or is it supposed to be dry?
Any advice is appreciated.
I removed the fuel control unit/shut off cover on the fuel injection pump and found pure fuel puddled in the cover. I replaced the #013 o-ring on the fuel control unit shaft and reassembled. It was kind of tricky lining up the plunger pin but I finally did it . I also made sure the fuel control rod moved freely. Started the engine, ran it for a few minutes then removed the cover and didn’t find any fuel but the engine ran differently. The engine seemed to accelerate ok but when letting off the accelerator pedal the rpm’s would drop to about 450-500 and then would rebound back up to normal 700-800.
After driving the truck for about 10 miles I removed the fuel control unit cover and found oil but there didn’t seem to be any fuel mixed in it and the rpm’s were still fluctuating.
Now with the questions.
If the fuel control unit plunger pin is installed wrong how does this affect engine operation?
What causes my engine to act like I am shutting off the fuel then it recovers when letting off the accelerator pedal?
Is it normal to find oil pooled in the fuel shut off cover or is it supposed to be dry?
Any advice is appreciated.
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