Doosan G25E-3:
Runs rich multiple codes

Truck fuel system is running extremely rich. 5 CO at times.It has a large number of codes. Os sensor is new. regulator pressure is 2psi. Map sensor wiring has been repaired previously and could be part of the issue. Is there a way to clear codes on this system? Any help appreciated.
  • Posted 27 Feb 2016 13:00
  • Discussion started by BartTech
  • Ontario, Canada
Showing items 1 - 3 of 3 results.
Could be a vaporizor problem.....could also be a trim valve problem...if i remember right there are two trim valve that have vacuum lines to them they should be located close to the vaporizor....also in the vacuum lines to the trim valves is a Y fitting and a check valve/restrictor valve...these get gummed up and need cleaned from time to time...again if memory serves me right the only thing we used to clean the trim valves and the other parts was diesel fuel...anything else used in the trim valve would guarantee you to replace it..can try cleaning or just replace them from the start of you believe they are the problem...
  • Posted 27 Feb 2016 18:27
  • Reply by kevin_t
  • Pennsylvania, United States
Thank you that is how we have been checking codes but there are too many. Will try clearing and retest. Is this fuel system known for any issues?
  • Posted 27 Feb 2016 13:59
  • Reply by BartTech
  • Ontario, Canada
Turn key to on position,dont start...as soon as you do...pump throttle pedal ten times....to retrieve codes you can do same bit instead of ten you pump throttle three times and read flash codes on the dash
  • Posted 27 Feb 2016 13:41
  • Modified 27 Feb 2016 13:42 by poster
  • Reply by kevin_t
  • Pennsylvania, United States

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