Doosan (& Daewoo) GC20E-5:
Throwing code 771

Hi all...I posted this in the Tech forum but I guess this is the place for Technicians...This truck will run fine for 30-45 minutes..Then it will start stumbling and then backfiring,but keeps running...If you shut it off during backfiring mode it wont start till after it sits awhile..I was told the 771 code was for a bad 02 sensor,I changed it but its still doing the same thing...The LP Reg and Mixer/Electric throttle body have been changed not long ago...Any help would be much appreciated...Thanks
  • Posted 15 Mar 2014 09:23
  • Discussion started by Fork1t
  • South Carolina, United States

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Fact of the week
In 1903, the first Tour de France was held in Paris. The cycling race had been postponed and prize money boosted after it failed to draw enough competitors. Invented to lift the circulation of newspaper L'Auto, it comprised of six long stages totalling 2,428 kilometres.