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With the cover off, move the metering valve through full turns to see if it sticks, this is the most likely cause of your problems. Definitely try the Diesel Mechanic in a Bottle. It is a powerful detergent, the best I have found for dissolving varnish. Give it a few hours to work and get...

The green wire on the injection pump is the cold start advance, it overcomes the case drain check valve cracking pressure, around 5 PSI. This further advances timing. On my 1031, the install of the PTO governor was incorrect and they had put a switched 12 volt line to the green wire, causing...

That is the low speed timing advance, driven off the throttle shaft cam. The timing advance is also driven by fuel pressure. I have had great luck with Diesel Mechanic in a Bottle. Just recently too after my 1031 sat for over a year and had the same symptoms. Take the top cover off, siphon...