I’ve got a JD 790 with a 3tne82a engine with only 539 hours that has a cylinder not working. the tractor started running poorly. so after checking for obvious issues i tried cracking the injector lines one at a time . on cylinder 3 it made no difference in the way the engine ran. i swapped injectors and the problem did not follow the injector . my next step is a compression test. has anyone experienced this issue.