Komatsu FG25ST-16:
RPM drop while operating

I have a komatsu that the engine rpm will drop for 1-2 second then pick back up. This repeats randomly. I have swapped accelerator pedal position sensor, injector, lock off valve vaporizer and baro sensor with all known good parts. The problem still persists. What have I missed?
  • Posted 9 Feb 2022 15:25
  • Discussion started by Daryl_Gulledge
  • Georgia, United States
Showing items 1 - 4 of 4 results.
No vacuum leaks also have you changed the etca possible gumed up or maybe the tps switches are going bad inside or throttle moter just thinking
  • Posted 12 Feb 2022 00:11
  • Reply by Scott_
  • Pennsylvania, United States
Scott
There are no codes. Have changed the task with known good.
  • Posted 11 Feb 2022 22:50
  • Reply by Daryl_Gulledge
  • Georgia, United States
I read your problem is there any codes in truck,if not l would check tps if everything checks out you might have to do a tas learn on ecm to set air fuel ratio and rpm to do this you need the hitishi 2000scanner
  • Posted 11 Feb 2022 13:33
  • Reply by Scott_
  • Pennsylvania, United States
Scott
A failing velocity govenor?
  • Posted 11 Feb 2022 11:12
  • Reply by ForklifttSteve
  • Mississippi, United States
Steve Pierce
Coast Equipment Services

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