Hey Ya’ll
So I have a 3406E Cat in a FLD120.
Recently got my engine rebuilt 2 months ago and it has started sputtering and smoking upon acceleration in the lower gears, if u park it and rev it to a certain rpm it will just stutter then go back to normal operation. It’s like a here and there type of thing it’ll act up then u can drive it for 2hrs without no issue.
Already replaced fuel filters/ check valves-cam sensor so far. Sounds like it’s either sucking air somewhere or it’s a wiring/injector issue.
https://youtube.com/shorts/0juHP_zhHJc?si=ls9V7AylFzHiGFeK
3406E Sputtering Only Under Acceleration
Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Jordonh, May 8, 2025.
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