Posted by UP Oliver on June 07, 2016 at 12:27:12 from (68.70.134.87):
I have a David Brown 990. It was working fine until late last fall when my wife was brushcutting, I was putting metal on the pole barn and could hear the tractor start to labor out in the field. I have more exhaust than usual, and a lack of power. It sounds like it is missing, but I am no expert on what that sounds like. Also, it misfires when I throttle up.
I have replaced the fuel filters, disconnected the air filter for a quick check there, I have used the dope (as one guy I know calls it), Diesel 911, Diesel mechanic in a bottle and Seafoam. I don't see any leaks anywhere in the fuel lines. It still runs poorly.
I don't know what the next step should be. My manual says to bleed the fuel system for misfires among other things. When I have bled the system in the past, once I get it running there has never been any problems like this so I doubt that is the problem? Wouldn't mind some advice on that.
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