310 JD diesel engine missing after warm-up

Subject:

Comments:
: I have an early 70's 310 Backhoe. It ran fine until last week. After several hours of work it started to miss and put out black smoke. I tried to clear the engine but it continued to miss. I shut it down and returned in 20 min it started and ran fine for 30 min and then started missing again. I shut down and started later, it runs fine for a while and then misses badly. The time it runs good is getting shorter and shorter. : So far I have done: : Drained the sediment trap (did not replace fuel filter not but did so 9 months ago) : Drained the fuel tank : Replaced the fuel line from tank to pump : Cleaned the air filter. : I replaced the fuel pump 6 months ago. : It seems to start missing when it when it warms up : This is an old worn out unit that gets only 100 or so hours a year around my 2 acres. : Any thoughts on the problem?

Optional Link URL:
Link Title:
Optional Image URL:

[ Save This Page ] [ Follow Ups ] [ Post Followup ] [ John Deere Tractors Discussion Forum ] [ FAQ ]