Keith: These new tractors are NOT fun to work on. Those injectors being bad, can cause all sorts of issues with the other engine systems. The problems today are more computer/sensor systems failing or partially failing. You hope for a total failure as those are easier to find.
An example we had on our JD 8330. One of the injectors was not misfiring but had a terrible pattern. So that cylinder was not burning all the fuel. So the system was seeing raw/unburnt fuel and reducing the fuel delivery to the entire engine. The result was low power without any codes. Several computer scans never showed any issue other than the fuel consumption being lower than normal. After fooling with it for a whole spring we just pulled all the injectors and had them checked. two were bad. The injectors had under 1000 hours on them.
One big problem with the agriculture equipment today is there are not enough NUMBERS of any unit to have near the data that you can easily find on your car/truck. Common cars can easily have 50-100 thousand units built each year. So there are lots of problems that show up across more units so you have shared knowledge on some really odd ball failures. Even a really popular tractor would not have more than 5000 units a year. So you do not have close to as much data. Also few bootleg fixes/programs because of the much smaller market.
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