James Holcombe
Member
I have 2004 JD 310G that I recently purchased with 1300 hrs. It cranks easily and idles at 900 rpm. It had set up a few years due to previous owner health. It has a slight miss but barely noticeable. If you leave at idle after 3 minutes it starts running badly. Shut engine off and immediately start again and runs good for 3 minutes and does it again. Very consistent hot or cold. If running at higher rpm also runs fine for about a minute. Then if I shut off and recrank runs fine for a minute and repeats. Has trouble code F494. I have removed and cleaned tank, sock, new fuel, filters , and added inline filter before primary pump. Blowed out lines and return lines.fixed check ball in fuel tank cap as it was creating lot of vaccum in tank. Checked injection pump return line and check valve under it. Nothing helped. Primary pump manual primer fills Filter easily so I would think that rules it out as problem. Unplugged all electric connectors and cleaned. I have ran out of all suggested troubleshooting. HELP PLEASE.