Reuben
Senior Member
I got a bad batch of fuel and had to change the fuel filters on my Deere 750J. I operated it for one day and it ran great but I noticed at the end of the day when I was letting it cool down the engine was fluctuating...of sorts. The RPM's weren't necessarily changing, it was just sort of "diesel pinging" and the exhaust note was changing, almost like a echoing affect, (hope you can follow me here). It was doing this about every second. I loaded it up on the lowboy the next day and it was doing the same. I brought it back to the shop parked it for five days until today when I thought it would be best to change the filters again before I start it. After I changed the filters I let it idle for 5 minutes. After five minutes, (of smooth idling I may add),I went to move it and it would not rev past 1200 rpms. At 1200 rpms it would start sputtering like it was starving for fuel, and puffing whitish smoke. I let it sit for a few hours and now it will rev just fine but it is doing the fluctuating "diesel pinging" thing at idle again. Does anyone have any idea what is going on. Fuel issue? injector issue? pump? etc?.
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