Hello I'm not sure but I think it's an injector. I notice a very slight miss at low RPM's. as I let the engine grow up to 2300 I can start hearing it out of the exhaust. It doesn't hesitate when pulling empty or loaded with light loads, it's very rare I pull more than 1,000lbs on my trailer(4 wheelers). I only noticed the ETG's are a little higher, and 50% of the time it takes longer to start. The engine has 166,000 miles, had two oil sample analysis done by blackstone. I ran 7,000 miles on one oil change, and 11,500 miles on the next oil change and everything g is just fine. I paid the extra charge for a complete analysis and all is just fine. The fuel PPM are below the allowances including water and everything else they test. I use Mobile 1 5/40 Turbo Diesel engine oil. Has anyone had the same symptoms? Thanking you in advance

Anthony C

 

This is a bad injector