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Need Help Diagnosing Fuel Delivery Issue

WWRD99

Well-known member
Steel Soldiers Supporter
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Location
York Pa
Well I tried again last night - got it fired up and still the same problem. Installed the clear hose like mentioned, and there was not an air bubble when it was running. Only after shutting it off did a small bubble form.
View attachment 948910Next i tried cracking injector lines while it was running and had about 20% throttle. It would idle down each time i cracked an injector line, and spurt from the hose under pressure, then would idle back up once i tightened the nut (understandable i am thinking since then there would be pressure back in the system again):


You can see below that there is a bit of rust inside the governor housing, not sure that that matters since the fuel looks clean? Fuel Wouldn't be too old or anything. Within the last year easy

View attachment 948911

View attachment 948912

It just seems to me like the IP is running and working but there is some other small issue causing the timing to be off? Or maybe i am wrong and this is a key symptom of an injector pump going out?
Does that governor sleeve even move?? That is very rusted shut. It would make sense why it shuts off now.
 

huskerfan

Member
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Location
Lincoln, NE
Does that governor sleeve even move?? That is very rusted shut. It would make sense why it shuts off now.
Yes it does, it just doesn't go back after hitting full throttle - video below:


I thought the metering valve was sticking, but after pulling off the injection pump and then looking at my buddy's injection pump on his 6.2, i am not sure what causes the metering valve to close after you let off the throttle because his does not seem to close either after letting off of the throttle? Video of his IP below that is a lot cleaner than mine:


I thought there would be a spring around the metering valve that would cause it to pull back shut when you lift off the throttle, but after pulling out the governor allen head bolt, there was no spring around the metering valve once i removed it. Does anyone know what causes the metering valve to close when you let off the throttle? I was just going to swap this IP from my buddy's 6.2 into mine, but if the linkage on it moves the same as mine, it seems i would have the same issue....
 
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